| John Heywood | John Heywood |
| John Hicks | John Hicks |
| John Hoeven | John Hoeven |
| John Hopcroft | John Hopcroft |
| John Horton Conway | John Horton Conway |
| John Howard | John Howard |
| John Howard Northrop | John Howard Northrop |
| John Hugenholtz | John Hugenholtz |
| John Hume | John Hume |
| John Hunyadi | Jean Hunyadi |
| John Hurt | John Hurt |
| John Huston | John Huston |
| John Hyrcanus | Jean Hyrcan Ier |
| John I | Jean Ier |
| John I Albert of Poland | Jean Ier Albert |
| John I Lemigius | Jean |
| John I of Amalfi | Jean Ier |
| John I of Bohemia | Jean Ier de Bohême |
| John I of Castile | Jean Ier de Castille |
| John I of Denmark | Jean Ier de Danemark |
| John I of Dreux | Jean Ier de Dreux |
| John I of France | Jean Ier de France |
| John I of Naples | Jean Ier |
| John I of Ponthieu | Jean Ier de Ponthieu |
| John I of Portugal | Jean Ier de Portugal |
| John I of Sweden | Jean Ier de Suède |
| John I of Trebizond | Jean Ier de Trébizonde |
| John I Tzimiskes | Jean Ier Tzimiskès |
| John II | Jean II |
| John II Casimir of Poland | Jean II Casimir Vasa |
| John II Comnenus | Jean II Comnène |
| John II Komnenos | Jean II Comnène |
| John II of Castile | Jean II de Castille |
| John II of Cyprus | Jean II de Chypre |
| John II of Dreux | Jean II de Dreux |
| John II of France | Jean II de France |
| John II of Jerusalem | Jean Ier de Chypre |
| John II of Portugal | Jean II de Portugal |
| John II of Salerno | Jean II |
| John II of Trebizond | Jean II de Trébizonde |
| John II Sigismund Zápolya | Jean II de Hongrie |
| John III | Jean III |
| John III Doukas Vatatzes | Jean III Doukas Vatatzès |
| John III of Navarre | Jean III de Navarre |
| John III of Portugal | Jean III de Portugal |
| John III of Sweden | Jean III de Suède |
| John III of Trebizond | Jean III |
| John III Sobieski | Jean III Sobieski |
| John Irving | John Irving |
| John Italus | Jean Italos |
| John IV | Jean IV |
| John IV Laskaris | Jean IV Lascaris |
| John IV of Portugal | Jean IV de Portugal |
| John IV of Trebizond | Jean IV |
| John Jacob Astor | John Jacob Astor |
| John Jacob Astor IV | John Jacob Astor IV |
| John James Audubon | John James Audubon |
| John James Richard Macleod | John James Richard Macleod |
| John Jay | John Jay |
| John Jensen | John Jensen |
| John Jesus Flanagan | John Flanagan |
| John Jonston | Jan Jonston |
| John Joseph Hopfield | John Joseph Hopfield |
| John Joseph Merlin | Jean-Joseph Merlin |
| John Julius Norwich | John Julius Norwich |
| John Keats | John Keats |
| John Keble | John Keble |
| John Kemp Starley | John Kemp Starley |
| John Kendrew | John Kendrew |
| John Kenneth Galbraith | John Kenneth Galbraith |
| John Kerr | John Kerr |
| John Kerry | John Kerry |
| John King | John King |
| John Kinnamos | Jean Cinnamus |
| John Knox | John Knox |
| John Kufuor | John Kufuor |
| John Lambert | John Lambert |
| John Langdon Down | John Langdon-Down |
| John Lasseter | John Lasseter |
| John Lawrence LeConte | John Lawrence LeConte |
| John Layfield | John Layfield |
| John le Carré | John le Carré |
| John Lee Hooker | John Lee Hooker |
| John Legend | John Legend |
| John Leland | John Leland |
| John Lennard-Jones | John Lennard-Jones |
| John Lennon | John Lennon |
| John Lescroart | John Lescroart |
| John Levén | John Levén |
| John Lightfoot FRS | John Lightfoot |
| John Lindley | John Lindley |
| John Locke | John Locke |
| John Logan | John David Gynn Logan |
| John Logie Baird | John Logie Baird |
