| William I of Provence | Guillaume Ier de Provence |
| William I of Sicily | Guillaume Ier de Sicile |
| William I of the Netherlands | Guillaume Ier des Pays-Bas |
| William I of Württemberg | Guillaume Ier de Wurtemberg |
| William II | Guillaume II d'Allemagne |
| William II of Aquitaine | Guillaume II des Pays-Bas |
| William II of Dampierre | Guillaume II de Dampierre |
| William II of Holland | Guillaume Ier du Saint-Empire |
| William II of Provence | Guillaume II de Provence |
| William II of Sicily | Guillaume II de Sicile |
| William II of the Netherlands | Guillaume II des Pays-Bas |
| William II of Villehardouin | Guillaume II de Villehardouin |
| William II of Württemberg | Guillaume II de Wurtemberg |
| William II Sánchez of Gascony | Guillaume Sanche |
| William III | Guillaume III |
| William III of Aquitaine | Guillaume III de Poitiers |
| William III of Dampierre | Guillaume III de Dampierre |
| William III of Ponthieu | Guillaume Ier Ponthieu |
| William III of Provence | Guillaume III de Provence |
| William III of Sicily | Guillaume III de Sicile |
| William III of the Netherlands | Guillaume III des Pays-Bas |
| William III of Toulouse | Guillaume III des Pays-Bas |
| William Iron Arm | Guillaume Bras-de-Fer |
| William IV | Guillaume IV |
| William IV of Aquitaine | Guillaume IV de Poitiers |
| William IV of Ponthieu | Guillaume II de Ponthieu |
| William IV of Provence | Guillaume IV de Provence |
| William IV of the United Kingdom | Guillaume IV du Royaume-Uni |
| William IV of Toulouse | Guillaume IV du Royaume-Uni |
| William IX of Aquitaine | Guillaume IX de Poitiers |
| William Jackson Hooker | William Jackson Hooker |
| William James | William James |
| William James Sidis | William James Sidis |
| William Jennings Bryan | William Jennings Bryan |
| William Jones | William Jones |
| William Joseph Chaminade | Guillaume Chaminade |
| William Joseph Donovan | William Joseph Donovan |
| William Kamm | William Kamm |
| William Kapell | William Kapell |
| William Kemmler | William Kemmler |
| William Kidd | William Kidd |
| William Kirby | William Kirby |
| William Langland | William Langland |
| William Lassell | William Lassell |
| William Lawrence Bragg | William Lawrence Bragg |
| William Levada | William Joseph Levada |
| William Lipscomb | William Nunn Lipscomb |
| William Luther Pierce | William Luther Pierce |
| William Makepeace Thackeray | William Makepeace Thackeray |
| William Martin Leake | William Martin Leake |
| William McKinley | William McKinley |
| William McMaster Murdoch | William McMaster Murdoch |
| William Miller | William Miller |
| William Morgan | William Morgan |
| William Morris | William Morris |
| William Moseley | William Moseley |
| William Nylander | Wilhelm Nylander |
| William Oefelein | William Oefelein |
| William of Blois | Guillaume de Boulogne |
| William of Brandenburg | Guillaume de Prusse |
| William of Champeaux | Guillaume de Champeaux |
| William of Conches | Guillaume de Conches |
| William of Gellone | Guillaume de Gellone |
| William of Jumièges | Guillaume de Jumièges |
| William of Malmesbury | Guillaume de Malmesbury |
| William of Moerbeke | Guillaume de Moerbeke |
| William of Ockham | Guillaume d'Ockham |
| William of Poitiers | Guillaume de Poitiers |
| William of Rubruck | Guillaume de Rubrouck |
| William of Tudela | Guillaume de Tudèle |
| William of Tyre | Guillaume de Tyr |
| William of Volpiano | Guillaume de Volpiano |
| William Orbit | William Orbit |
| William Oughtred | William Oughtred |
| William Paley | William Paley |
| William Patrick Hitler | William Patrick Hitler |
| William Penn | William Penn |
| William Peter Blatty | William Peter Blatty |
| William Petty | William Petty |
| William Phillips | William Phillips |
| William Pitt the Younger | William Pitt le Jeune |
| William Quantrill | William Quantrill |
| William Ramsay | William Ramsay |
| William Randal Cremer | William Randal Cremer |
| William Reddington Hewlett | William Hewlett |
| William Rehnquist | William Rehnquist |
| William Robert Grove | William Grove |
| William Rosecrans | William Starke Rosecrans |
| William Ross Ashby | William Ross Ashby |
| William Rowan Hamilton | William Rowan Hamilton |
| William Roxburgh | William Roxburgh |
| William Saroyan | William Saroyan |
| William Sealy Gosset | William Gosset |
| William Shakespeare | William Shakespeare |
| William Shatner | William Shatner |
| William Shockley | William Shockley |
| William Sidney Smith | Sidney Smith |
| William Siemens | Carl Wilhelm von Siemens |
| William Smith | William Smith |
| William Somerset Maugham | William Somerset Maugham |
| William Speirs Bruce | William Speirs Bruce |
| William Standish Knowles | William Standish Knowles |
| William Stanley Jevons | William Stanley Jevons |
| William Starling Sullivant | William Starling Sullivant |
| William Stern | William Stern |
| William Styron | William Styron |
| William Swainson | William Swainson |
| William Tecumseh Sherman | William Tecumseh Sherman |
| William Tell | Guillaume Tell |
| William Thomas Beckford | William Thomas Beckford |
| William Thomson | William Thomson |
| William Tubman | William Tubman |
| William Turner | Joseph Mallord William Turner |
| William Turner Thiselton-Dyer | William Turner Thiselton-Dyer |
| William V | Guillaume V |
| William V of Aquitaine | Guillaume V de Poitiers |
| William Van Alen | William Van Alen |
| William VI of Aquitaine | Guillaume VI de Poitiers |
| William VI of Montferrat | Guillaume VI de Montferrat |
| William Vickrey | William Vickrey |
| William VII of Aquitaine | Guillaume VII de Poitiers |
| William VIII of Aquitaine | Guillaume VIII de Poitiers |
| William VIII of Montferrat | Guillaume VIII de Montferrat |
| William Wallace | William Wallace |
| William Wallace Denslow | William Wallace Denslow |
| William Walton | William Walton |
| William Westmoreland | William Westmoreland |
| William Whiston | William Whiston |
| William Wilson Morgan | William Wilson Morgan |
| William Wordsworth | William Wordsworth |
| William Wright | William Wright |
| William Wycherley | William Wycherley |
| William Wyler | William Wyler |
| William X of Aquitaine | Guillaume X de Poitiers |
| William-Adolphe Bouguereau | William Bouguereau |
| William-Jordan | Guillaume de Cerdagne |
| Williams | Williams |
| Williams County | Comté de Williams |
| Williams syndrome | Syndrome de Williams |
| Williamson County | Comté de Williamson |
| Willian Borges da Silva | Willian Borges da Silva |
| Willich | Willich |
| Willie Dixon | Willie Dixon |
| Willie Moretti | Willie Moretti |
| Willie Nelson | Willie Nelson |
| Willie The Lion Smith | Willie The Lion Smith |
| willing | disposé |
| willing or unwilling | bon gré mal gré |
| Willingen | Willingen |
| Willinghusen | Willinghusen |
