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Early 20th-century English mathematician and physicist
Sir John Edward Lennard-Jones KBE, FRS (27 October 1894 – 1 November 1954) was a British mathematician and professor of theoretical physics at the University
John_Lennard-Jones
Model of intermolecular interactions
physical chemistry, the Lennard-Jones potential (also termed the LJ potential or 12-6 potential; named for John Lennard-Jones) is an intermolecular pair
Lennard-Jones_potential
Topics referred to by the same term
architect John Lennard-Jones, British mathematician and professor of theoretical physics, known for the Lennard-Jones potential Leonard Jones (musician)
Leonard_Jones
Surname list
(16th–17th century), English Member of Parliament John Lennard-Jones British theoretical physicist Lennard baronets, either of two extinct baronetcies Lenard
Lennard
British theoretical chemist (1925–2004)
This was his thesis topic for his PhD at Cambridge supervised by John Lennard-Jones. In the early days of nuclear magnetic resonance he studied the underlying
John_Pople
Technique in quantum chemistry
participating in the chemical bond. It was introduced in 1929 by Sir John Lennard-Jones with the description of bonding in the diatomic molecules of the first
Linear combination of atomic orbitals
Linear_combination_of_atomic_orbitals
Topics referred to by the same term
John Lennard is an academic and writer. John Lennard may also refer to: John Lennard of the Lennard Baronets Jack Lennard, soccer player John Lennard-Jones
John_Lennard_(disambiguation)
British mathematical physicist (1889–1944)
Cambridge, he supervised the doctoral studies of 64 students, including John Lennard-Jones, Paul Dirac, and Garrett Birkhoff. Fowler died on 28 July 1944 in
Ralph_Fowler
British philosopher (1879–1952)
Sir John Lennard-Jones Vice-Chancellor of Oxford University In office 1935–1938 Preceded by Francis John Lys Succeeded by Sir John Lennard-Jones Personal
Sandie Lindsay, 1st Baron Lindsay of Birker
Sandie_Lindsay,_1st_Baron_Lindsay_of_Birker
-T)=k'\left({\frac {N_{A}}{V}}\right)^{2/3}(T_{c}-6\ \mathrm {K} -T)} As John Lennard-Jones and Corner showed in 1940 by means of statistical mechanics the constant
Eötvös_rule
English mathematical physicist (1900–1977)
by the Department of Scientific and Industrial Research. In 1927, John Lennard-Jones was appointed Professor of Theoretical physics, a chair being created
Beryl_May_Dent
Association of atoms to form chemical compounds
molecular orbital method (LCAO) approximation was introduced by Sir John Lennard-Jones, who also suggested methods to derive electronic structures of molecules
Chemical_bond
particle is actually the almost massless neutrino. 1931: John Lennard-Jones proposes the Lennard-Jones inter-atomic potential. Walther Bothe and Herbert Becker
Timeline_of_quantum_mechanics
Method for describing the electronic structure of molecules using quantum mechanics
through the efforts of Friedrich Hund, Robert Mulliken, John C. Slater, and John Lennard-Jones. MO theory was originally called the Hund-Mulliken theory
Molecular_orbital_theory
Group of low-reactive, gaseous chemical elements
interactions. The Lennard-Jones potential, often used to model intermolecular interactions, was deduced in 1924 by John Lennard-Jones from experimental
Noble_gas
Long horizontal line punctuation mark
dash – for example, the Lennard-Jones potential [hyphen] is named after one person (John Lennard-Jones), as are Bence Jones proteins and Hughlings Jackson
Dash
Frenkel (1894–1952) Hans Kramers (1894–1952) Pyotr Lukirsky (1894–1954) John Lennard-Jones (1894–1954) Aleksandr Khinchin (1894–1959) Norbert Wiener (1894–1964)
List of theoretical physicists
List_of_theoretical_physicists
Chemistry based on quantum physics
Hans Hellmann, Maria Goeppert Mayer, Erich Hückel, Douglas Hartree, John Lennard-Jones, and Vladimir Fock.[vague] The electronic structure of an atom or
Quantum_chemistry
British applied mathematician, theoretical chemist and religious author (1910–1974)
Coulson started graduate work with R. H. Fowler but switched to Sir John Lennard-Jones, and was awarded a Ph.D. in 1936 for work on the electronic structure
Charles_Coulson
Textbook by Paul Dirac
not suitable as an introduction to quantum mechanics. Similarly, John Lennard-Jones recommended the book for everyone who wished to stay abreast with
The Principles of Quantum Mechanics
The_Principles_of_Quantum_Mechanics
Lenard – Hungary, Germany (1862–1947), Nobel laureate John Lennard-Jones – U.K. (1894–1954) John Leslie – U.K. (1766–1832) Walter Lewin – Netherlands,
List_of_physicists
1969 Ronald Norrish 1966 John Monteath Robertson 1963 Alexander Todd 1960 Eric Rideal 1957 Edmund Hirst 1954 John Lennard-Jones 1951 Christopher Kelk Ingold
Longstaff_Prize
British chemist
first by Martin Lowry, and then, after Lowry's death in 1936, by John Lennard-Jones. He awarded a PhD in 1937 from Cambridge, for a thesis on "The Quantum
Samuel_Francis_Boys
Research university in England
Pathology at the university from 1968 to 1982, Sir John Lennard-Jones, discoverer of the Lennard-Jones potential in physics and Alfred Marshall, one of
University_of_Bristol
Wave-like behavior of an electron in a molecule
approximation for molecular orbitals was introduced in 1929 by Sir John Lennard-Jones. His ground-breaking paper showed how to derive the electronic structure
Molecular_orbital
British military research site
Hartree–Fock method of approximating n-body wavefunctions Sir John Lennard-Jones, devisor of the Lennard-Jones potential description of atomic attraction J.W. Maccoll
Fort_Halstead
Canadian American chemist (1902–1984)
England, where he was welcomed by Ralph H. Fowler. Spedding worked with John Lennard-Jones, and attended lectures given by Max Born. He paid a visit to Niels
Frank_Spedding
English mathematician and physicist (1909–1991)
structure of metals and the magnetic properties of crystals with John Lennard-Jones. In 1935, Penney submitted his final thesis, which contained the fundamental
William_Penney,_Baron_Penney
Greek gastroenterologist (1931–2021)
His professors were Sidney Truelove, Sir Francis Avery Jones, Leslie Witts, and John Lennard-Jones. After his return to Greece, he worked initially at Evangelismos
Orestes_Manousos
UK university department
was founded as the Mathematical Laboratory under the leadership of John Lennard-Jones on 14 May 1937, though it did not get properly established until after
Department of Computer Science and Technology, University of Cambridge
Department_of_Computer_Science_and_Technology,_University_of_Cambridge
Alexander Dunlop Lindsay, 1st Baron Lindsay of Birker (1949–52) Sir John Lennard-Jones (1953–54) Sir George Barnes (1956–60) Harold McCarter Taylor (1961–67)
List of Keele University people
List_of_Keele_University_people
First female computer scientist in Canada
the Lab, she attended courses on quantum physics with Paul Dirac, John Lennard-Jones and Nicholas Kemmer, number theory with Albert Ingham, and perhaps
Beatrice_Worsley
Town in Greater Manchester, England
operatic tenor, born in Leigh and attended St Joseph's School. Sir John Lennard-Jones (1894–1954), mathematician and professor of theoretical physics at
Leigh,_Greater_Manchester
University as the Mathematical Laboratory (under the leadership of John Lennard-Jones), it was not until 2001 that the provision of computing services across
University of Cambridge Computing Service
University_of_Cambridge_Computing_Service
German-Canadian physicist and physical chemist (1904–1999)
of Göttingen and Bristol University under James Franck, Max Born, John Lennard-Jones 1930 Darmstadt University of Technology: Privatdozent (lecturer) and
Gerhard_Herzberg
Meitner discovers what is now referred to as the Auger process 1924 John Lennard-Jones proposes a semiempirical interatomic force law 1924 Louis de Broglie
Timeline of atomic and subatomic physics
Timeline_of_atomic_and_subatomic_physics
Professorship at Cambridge
1932–1944 Sir Ralph H. Fowler 1946–1958 Douglas Hartree 1932–1953 Sir John Lennard-Jones (elected Principal of the University College of North Staffordshire
John Humphrey Plummer Professor
John_Humphrey_Plummer_Professor
Leidenfrost Lenard effect – Philipp Eduard Anton von Lenard Lennard-Jones potential – John Lennard-Jones Lense–Thirring effect (a.k.a. Thirring effect) – Josef
Scientific phenomena named after people
Scientific_phenomena_named_after_people
American physicist and chemist (1896–1986)
and Mulliken's molecular-orbital method, including contributions by John Lennard-Jones, proved to be more flexible and applicable to a vast variety of types
Robert_S._Mulliken
British broadcasting executive
Publications of the Navy Records Society, vol. 69 by John Montagu, George Reginald Barnes and John Hely Owen (1932) Laurence Gilliam: Barnes, Sir George
George Barnes (BBC controller)
George_Barnes_(BBC_controller)
and List of places named after Lenin. John Lennard-Jones, British mathematician – Lennard-Jones potential John Lennon, British rock musician - Lennon
List_of_eponyms_(L–Z)
British computer scientist (1913–2010)
radio by his chemistry teacher. He studied the Mathematical Tripos at St John's College, Cambridge, from 1931 to 1934, and in 1936 completed his PhD in
Maurice_Wilkes
Public university in Keele, England
Physiotherapy (ONSSP), which had been a separate institution based at the Robert Jones and Agnes Hunt Orthopaedic Hospital in Oswestry, Shropshire, merged with
Keele_University
British mathematician and physicist
the then Director Professor John Lennard-Jones. He was awarded his PhD in 1946. At the outbreak of war in 1939 Lennard-Jones and his research team were
John_Corner
The concept of excitons is proposed by Yakov Frenkel. John Lennard-Jones proposes the Lennard-Jones interatomic potential. Ernst Ruska creates the first
Timeline of condensed matter physics
Timeline_of_condensed_matter_physics
Northern Irish applied mathematician
University Belfast and St John's College, Cambridge, where he studied for a PhD under the supervision of John Lennard-Jones. For his work on the Roothaan-Hall
George_G._Hall
Former air warfare service of the British Army
engineer and executive Jack Hobbs, cricketer W. E. Johns, author of the Biggles books John Lennard-Jones, scientist Cecil Lewis, author of Sagittarius Rising
Royal_Flying_Corps
Eyring, Joseph O. Hirschfelder, George E. Kimball, Masao Kotani, John Lennard-Jones, Per-Olov Löwdin, Duncan A. MacInnes, Henry Margenau, Joseph Edward
Shelter Island Conference on Quantum Mechanics in Valence Theory, 1951
Shelter_Island_Conference_on_Quantum_Mechanics_in_Valence_Theory,_1951
John Lennard-Jones (Trinity) Geraint F. Lewis (unknown), astrophysicist Jack Lewis, Baron Lewis of Newnham (Robinson) James Lighthill (Trinity) John Edensor
List of University of Cambridge people
List_of_University_of_Cambridge_people
development of the linear induction motor and Maglev rail system John Lennard-Jones (1894–1954), mathematician and physicist, born in Leigh and attended
List of people from the Metropolitan Borough of Wigan
List_of_people_from_the_Metropolitan_Borough_of_Wigan
later served as Director of the Admiralty Research Laboratory. Sir John Lennard-Jones, entered Manchester University where he changed his subject to mathematics
List of University of Manchester people
List_of_University_of_Manchester_people
War II," by 1945, the Cambridge Mathematical Laboratory created by John Lennard-Jones utilized the latest computing devices to perform the equations. These
History of numerical solution of differential equations using computers
History_of_numerical_solution_of_differential_equations_using_computers
Technology, University of Cambridge Cambridge United Kingdom 1937 John Lennard-Jones Mathematical Laboratory, 1937. Renamed to Computer Laboratory, 1970
List of academic computer science departments
List_of_academic_computer_science_departments
Australian quantum chemist and mathematician
Chemistry under the supervision of John Lennard-Jones, and also interacted with S. Francis Boys, George G. Hall and John Pople. He worked on Moffitt's method
Andrew_Crowther_Hurley
School in Greater Manchester, England
Master of the Queen's Music from 2004 David Evans CBE, microbiologist John Lennard-Jones KBE, mathematician and professor of theoretical physics Basil Lythgoe
Bedford_High_School,_Leigh
Chemistry award given by the Royal Society
Pierre Curie and Marie Curie "for their researches on radium" and in 1968 to John Cornforth and George Joseph Popják "in recognition of their distinguished
Davy_Medal
contributions from the different possible electronic configurations. 1929 John Lennard-Jones Introduced the linear combination of atomic orbitals approximation
Timeline of physical chemistry
Timeline_of_physical_chemistry
British computer scientist
been founded as the Mathematical Laboratory under the leadership of John Lennard-Jones in 1937, although it did not become properly established until after
David Hartley (computer scientist)
David_Hartley_(computer_scientist)
Policy maker, scholar, and advocate for people with developmental disabilities
studied with mathematician Emmy Noether before Noether's death in 1935. John Lennard-Jones supervised her PhD work in the Theoretical Chemistry Laboratory at
Elizabeth_Monroe_Boggs
British civil servant and mathematician
and ions". Cook worked as a part-time lecturer, and an assistant to John Lennard-Jones. He considered becoming a teacher, but in 1928 he elected to become
William_Richard_Joseph_Cook
atoms and molecules. The phenomenon has been explained in 1936 by John Lennard-Jones and Devonshire[who?] in terms of resonant transitions to bound surface
Selective_adsorption
Model of the potential energy of a diatomic molecule
represent ab initio points for KLi and KBe. Dilithium Morse potential Lennard-Jones potential Le Roy, Robert J.; N. S. Dattani; J. A. Coxon; A. J. Ross;
Morse/Long-range_potential
Former British learned society
Professor William Edward Garner: 1945–1947 Professor Arthur John Allmand: 1947–1948 Sir John Lennard-Jones: 1948–1950 Sir Charles Goodeve: 1950–1952 Sir Hugh Taylor:
Faraday_Society
soil-free all the way to maturity, the basis of hydroponics. Sir John Lennard-Jones introduces his linear combination of atomic orbitals method for approximation
1929_in_science
1982 studio album by Theatre of Hate
guitar Stan Stammers – bass guitar John "Boy" Lennard – saxophone, clarinet Luke Rendall – drums Technical Mick Jones – production Jeremy Green – engineering
Westworld (Theatre of Hate album)
Westworld_(Theatre_of_Hate_album)
English lutenist and composer
Leicester (1563–1626) The Second Booke of Ayres, 1601, dedicated to Sir Henry Lennard, 12th Baron Dacre (1570–1616) Third book, 1605, dedicated to Henry Frederick
Robert Jones (English composer)
Robert_Jones_(English_composer)
British physicist (1909–1993)
Fellow of Trinity College, Cambridge. At Cambridge he worked with John Lennard-Jones and Sydney Chapman. In 1938 he was awarded the Royal Institute of
Bill_Price_(physicist)
Dawson Arthur Thomas Doodson H. J. Gough Sir John Hammond Sir Gordon Morgan Holmes Harold King John Lennard-Jones James Walter McLeod Sir Alan Sterling Parkes
List of fellows of the Royal Society elected in 1933
List_of_fellows_of_the_Royal_Society_elected_in_1933
1988 TV film directed by William H. Macy
Jonathan Katz, Fran Brill, John C. Jones and Felicity Huffman. The film premiered on HBO on October 17, 1988. Griffin Dunne as Lennard "Len" Burdette Paul Dooley
Lip_Service_(1988_film)
English actor (born 1940)
brother, Rodney (played by Nicholas Lyndhurst), and Grandad (played by Lennard Pearce) and, in later episodes, Uncle Albert (played by Buster Merryfield)
David_Jason
British rock band
Alan St. Clair on guitar, John Lennard on saxophone and Neil Pyzer on keyboards and additional saxophone. In 1984, John Lennard was replaced by Mickey Donnelly
Spear_of_Destiny_(band)
British post-punk band
Stammers (formerly of The Straps and The Epileptics), saxophonist John "Boy" Lennard, guitarist Steve Guthrie and drummer Luke Rendle (formerly of Crisis
Theatre_of_Hate
State of matter
applicability and importance, the Lennard-Jones model system is often referred to as 'Lennard-Jonesium'. The Lennard-Jones potential between molecules can
Gas
American actor (born 1963)
Archived from the original on August 4, 2025. Retrieved July 8, 2025. Lennard, Dominic (2012). "Wonder Boys – Matt Damon, Johnny Depp and Robert Downey
Johnny_Depp
Sutherland) can be simply expressed in terms of elementary functions. The Lennard–Jones model predicts a more complicated T {\displaystyle T} -dependence, but
Temperature dependence of viscosity
Temperature_dependence_of_viscosity
British musical group
Mick Jones formed a new band called Top Risk Action Company (T.R.A.C.). He recruited bassist Leo "E-Zee Kill" Williams, saxophonist John "Boy" Lennard (from
Big_Audio_Dynamite
British television sitcom (1981–2003)
Trotters' highs and lows in life, in particular their attempts to get rich. Lennard Pearce starred in the first three series as Del and Rodney's Grandad. After
Only_Fools_and_Horses
of quantum theory. The university's other early staff included John Edward Lennard-Jones, Beryl May Dent, Herbert Wakefield Banks Skinner and William Sucksmith
Arthur_Mannering_Tyndall
Convex polyhedron with 12 triangular faces
may be placed on a sphere and can also be used as a minimum possible Lennard-Jones potential among all eight-sphere clusters. The snub disphenoid can be
Snub_disphenoid
1975 television film by George Cukor
as 4th Barrister John Bromley as 5th Barrister Leslie Southwick as 6th Barrister Stanley Platts as Foreman of the Jury Philip Lennard as 1st Reporter Peter
Love_Among_the_Ruins_(film)
English country house
pp.24–26 Barrett Lennard, p.116. Barrett Lennard, pp. 116–117. Barrett Lennard, pp. 10–14. Barrett Lennard, p.123 Zim Barrett Lennard, p. 231. Town, p
Knole
Actor (born 1960)
Teaching Hospital, in Ibadan, Nigeria to English parents: mother Anne Lennard, a tour guide and former teacher, and father Wallace Weaving, a seismologist
Hugo_Weaving
Tennis championship
wildcard at any major to do so in the Open Era. Aged 36 years, 71 days, Jan-Lennard Struff became the oldest first-time major quarterfinalist in the Open Era
2026 Wimbledon Championships – Men's singles
2026_Wimbledon_Championships_–_Men's_singles
1951 film by H. Bruce Humberstone
1950 and mostly took place at Associated British's Elstree Studios. Rober Lennard was originally announced as director. The film was a hit at the British
Happy_Go_Lovely
Tennis championship
replaced by Anirudh Chandrasekar / Takeru Yuzuki Yannick Hanfmann / Jan-Lennard Struff → not replaced Daniel Mérida / Camilo Ugo Carabelli → replaced by
2026 Wimbledon Championships – Men's doubles
2026_Wimbledon_Championships_–_Men's_doubles
British actor (born 1944)
Venice (1980) as Gratiano Strangers (1980–1982) as Det. Chief Insp. Jim Lennard / Willie Bruce Brideshead Revisited (1981) as Sergeant Block The Bell (1982)
Kenneth_Cranham
Lord Deputy to Queen Elizabeth I (1528–1592)
(Subscription, Wikipedia Library access or UK public library membership required.) Lennard, T. Barrett (1904). Barron, Oswald (ed.). "Sir Francis Barnham". The Ancestor
John_Perrot
Welsh novelist (1929–2023)
publication dates) Liner notes for Protection (biographical information) John Lennard, 'Of Policemen and Poussin: Bill James's Dance to the Muzak of Crime'
Bill_James_(novelist)
1982 British TV series or programme
written by John Sullivan, and directed and produced by Ray Butt. Cast: David Jason as Derek Trotter, Nicholas Lyndhurst as Rodney Trotter, Lennard Pearce
The_Funny_Side_of_Christmas
English social worker (1925–2005)
ISBN 9780199671540. Lennard-Jones, John (10 February 2005). "Lady Juliet Bingley (obituary)". The Guardian. Retrieved 1 February 2019. Lennard-Jones, John (2005).
Juliet_Bingley
1923 film
Douglas - Helen Plugenet Harold French - Lennard Wilmore Sidney Paxton - Henry Wilmore Roy Travers - Sir John Plugenet Bertie White - Aubrey Viveash William
The_Hypocrites_(1923_film)
British TV game show (1971–1977)
Emmott 1972 Philip Senior beat Dennis Jones 1973 John Chell beat William Woolwich 1974–1977 Not held 1972 John Kropacz & Frank Bowett 6–0 Eric Crane &
The_Indoor_League
Number of atoms, molecules or ions bonded to a molecule or crystal
Sean; Kaltsoyannis, Nikolas; Downs, Anthony J.; Tang, Christina Y.; Turner, John F. C. (2002). "Molecular Structures of Two Metal Tetrakis(tetrahydroborates)
Coordination_number
Interactions between groups of atoms that do not arise from chemical bonds
pronounced for the attractive induction and dispersion forces. The Lennard-Jones potential is often used as an approximate model for the isotropic part
Van_der_Waals_force
English surgeon and writer (1703–1733)
1729, Jane, the elder daughter of the Hon. Dacre Barrett-Lennard. An illegitimate son, John Ranby (1743–1820), became known as a pamphleteer. His daughter
John_Ranby
American chemist
Chemical Physics Prize from the American Physical Society, the Bourke and Lennard-Jones Lectureships from the Royal Society of Chemistry, the Hinshelwood Lectureship
David_Chandler_(chemist)
Hoddesdon in Hertfordshire. Liddell Hart Centre for Military Archives Lennard-Jones, John (7 March 2013). "Bingley [née Vick], Juliet Martin, Lady Bingley
Alexander_Bingley
Welsh comedian (born 1958)
father, Harry, worked for the National Coal Board and his mother, Anita (née Jones), was a singer with the Welsh National Opera. The family moved to Enfield
Paul_Whitehouse
American speculative fiction author (born 1949)
OCLC 430954881. Lennard, John (2010). "Of Marriage and Mutations: Lois McMaster Bujold and the Several Lives of Miles Naismith Vorkosigan". In John Lennard (ed.)
Lois_McMaster_Bujold
Anglo-Irish politician and peer
politician and peer. Chichester was the eldest son of Lady Mary Jones and Lieutenant Colonel John Chichester (1609–1647), of Dungannon, County Tyrone, who was
Arthur Chichester, 2nd Earl of Donegall
Arthur_Chichester,_2nd_Earl_of_Donegall
travel, tourism, insurance
JOHN LENNARD-JONES
JOHN LENNARD-JONES
Surname or Lastname
English
English : variant spelling of Leopard.
Male
English
Variant spelling of English Leonard, LENARD means "lion-strong."
Boy/Male
American, Celebrity, Christian, Danish, Indian, Swedish
God is Merciful; Gift of God; Similar to John
Boy/Male
Indian
German form of John
Male
Italian
Italian form of Roman Latin Januarius, GENNARO means "January."
Male
German
Variant spelling of German Leonhardt, LEONHARD means "lion-strong."
Surname or Lastname
English
English : variant of Liddiard.Revolutionary soldier William Ledyard was born at Groton, CT, in 1738, a descendant of John Ledyard who sailed from Bristol, England, and settled in CT. The celebrated traveler John Ledyard (1751–89) was William’s nephew and was also born in Groton.
Boy/Male
Hindu
God has been gracious: has shown favor in the bible John the baptist baptized christ in the jordan
Surname or Lastname
English and Scottish
English and Scottish : patronymic from Leonard.
Surname or Lastname
English
English : variant of Kennard.
Male
English
English name probably derived from Anglo-Saxon Cyneweard, KENNARD means "royal guard."
Male
Italian
Italian, Portuguese and Spanish form of German Leonhard, LEONARDO means "lion-strong."
Surname or Lastname
English
English : variant spelling of Leopard.
Surname or Lastname
English
English : variant of Reynard.
Male
English
 English form of Anglo-Saxon Beornheard, BERNARD means "bold as a bear." Compare with another form of Bernard.
Male
Scandinavian
Scandinavian form of Old High German Lewenhart, LENNART means "lion-strong."
Male
English
Variant spelling of English Leonard, LENNARD means "lion-strong."
Male
English
 Anglicized form of Greek Ioannes (Latin Johannes), JOHN means "God is gracious." In the bible, this is the name of many characters, including John the Baptist.
Surname or Lastname
English, Welsh, German, etc.
English, Welsh, German, etc. : ultimately from the Hebrew personal name yÅÌ£hÄnÄn ‘Jehovah has favored (me with a son)’ or ‘may Jehovah favor (this child)’. This personal name was adopted into Latin (via Greek) as Johannes, and has enjoyed enormous popularity in Europe throughout the Christian era, being given in honor of St. John the Baptist, precursor of Christ, and of St. John the Evangelist, author of the fourth gospel, as well as others of the nearly one thousand other Christian saints of the name. Some of the principal forms of the personal name in other European languages are Welsh Ieuan, Evan, Siôn, and Ioan; Scottish Ia(i)n; Irish Séan; German Johann, Johannes, Hans; Dutch Jan; French Jean; Italian Giovanni, Gianni, Ianni; Spanish Juan; Portuguese João; Greek IÅannÄ“s (vernacular Yannis); Czech Jan; Russian Ivan. Polish has surnames both from the western Slavic form Jan and from the eastern Slavic form Iwan. There were a number of different forms of the name in Middle English, including Jan(e), a male name (see Jane); Jen (see Jenkin); Jon(e) (see Jones); and Han(n) (see Hann). There were also various Middle English feminine versions of this name (e.g. Joan, Jehan), and some of these were indistinguishable from masculine forms. The distinction on grounds of gender between John and Joan was not firmly established in English until the 17th century. It was even later that Jean and Jane were specialized as specifically feminine names in English; bearers of these surnames and their derivatives are more likely to derive them from a male ancestor than a female. As a surname in the British Isles, John is particularly frequent in Wales, where it is a late formation representing Welsh Siôn rather than the older form Ieuan (which gave rise to the surname Evan). As an American family name this form has absorbed various cognates from continental European languages. (For forms, see Hanks and Hodges 1988.)
Male
English
English form of French Léonard, LEONARD means "lion-strong."Â
JOHN LENNARD-JONES
JOHN LENNARD-JONES
JOHN LENNARD-JONES
JOHN LENNARD-JONES
JOHN LENNARD-JONES
JOHN LENNARD-JONES
JOHN LENNARD-JONES
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