| 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 |
