| William II of Sicily | Guglielmo II di Sicilia |
| William II of the Netherlands | Guglielmo II dei Paesi Bassi |
| William II of Württemberg | Guglielmo II di Württemberg |
| William II Sánchez of Gascony | Guglielmo I di Guascogna |
| William III | Guglielmo III |
| William III of Aquitaine | Guglielmo III di Aquitania |
| William III of Dampierre | Guglielmo II di Germania |
| William III of Montferrat | Guglielmo III del Monferrato |
| William III of Ponthieu | Guglielmo III dei Paesi Bassi |
| William III of Provence | Guglielmo III di Provenza |
| William III of Sicily | Guglielmo III di Sicilia |
| William III of the Netherlands | Guglielmo III dei Paesi Bassi |
| William III of Toulouse | Guglielmo III di Tolosa |
| William Iron Arm | Guglielmo Braccio di Ferro |
| William IV of Aquitaine | Guglielmo IV di Aquitania |
| William IV of Montferrat | Guglielmo IV del Monferrato |
| William IV of Provence | Guglielmo IV del Regno Unito |
| William IV of the United Kingdom | Guglielmo IV del Regno Unito |
| William IV of Toulouse | Guglielmo IV di Tolosa |
| William Jackson Hooker | William Jackson Hooker |
| William James | William James |
| William Jennings Bryan | William Jennings Bryan |
| William Jones | William Jones |
| William Joseph Chaminade | Guillaume-Joseph Chaminade |
| William Joyce | William Joyce |
| William Kamm | Manuel Corral |
| William Kent | William Kent |
| William Lassell | William Lassell |
| William Lawrence Bragg | William Lawrence Bragg |
| William Levada | William Joseph Levada |
| William Makepeace Thackeray | William Makepeace Thackeray |
| William McKinley | William McKinley |
| William McMaster Murdoch | William Murdoch |
| William Morris | William Morris |
| William Moseley | William Moseley |
| William Murphy | William Parry Murphy |
| William of Baskerville | Guglielmo da Baskerville |
| William of Champeaux | Guglielmo di Champeaux |
| William of Conches | Guglielmo di Conches |
| William of Gellone | Guglielmo I di Tolosa |
| William of Occam | Guglielmo di Ockham |
| William of Ockham | Guglielmo di Ockham |
| William of Septimania | Guglielmo II di Tolosa |
| William of Tyre | Guglielmo di Tiro |
| William of Volpiano | Guglielmo da Volpiano |
| William Orbit | William Orbit |
| William Penn | William Penn |
| William Peter Blatty | William Peter Blatty |
| William Petersen | William Petersen |
| William Pitt the Younger | William Pitt il Giovane |
| William Ramsay | William Ramsay |
| William Randal Cremer | William Randal Cremer |
| William Reddington Hewlett | Bill Hewlett |
| William Rehnquist | William Rehnquist |
| William Riker | William Riker |
| William Robert Grove | William Robert Grove |
| William Rosecrans | William Starke Rosecrans |
| William Rowan Hamilton | William Rowan Hamilton |
| William Saroyan | William Saroyan |
| William Sealy Gosset | William Sealy Gosset |
| William Seward Burroughs I | William Seward Burroughs |
| William Shakespeare | William Shakespeare |
| William Shatner | William Shatner |
| William Shepherd | William Shepherd |
| William Shockley | William Bradford Shockley |
| William Smith | William Smith |
| William Somerset Maugham | William Somerset Maugham |
| William Speirs Bruce | William Speirs Bruce |
| William Stewart Halsted | William Stewart Halsted |
| William Styron | William Styron |
| William Swainson | William Swainson |
| William Tecumseh Sherman | William Tecumseh Sherman |
| William Tell | Guglielmo Tell |
| William Thomas Beckford | William Beckford |
| William Thomas Riker | William Riker |
| William Thomson | William Thomson |
| William Turner | William Turner |
| William V of Aquitaine | Guglielmo V di Aquitania |
| William VI of Aquitaine | Guglielmo VI di Aquitania |
| William VI of Montferrat | Guglielmo VI del Monferrato |
| William VII of Aquitaine | Guglielmo VII di Aquitania |
| William VIII of Aquitaine | Guglielmo VIII di Aquitania |
| William VIII of Montferrat | Guglielmo VIII del Monferrato |
| William Wakefield Baum | William Wakefield Baum |
| William Wallace | William Wallace |
| William Walton | William Turner Walton |
| William Westmoreland | William Westmoreland |
| William Wordsworth | William Wordsworth |
| William Wyler | William Wyler |
| William X of Aquitaine | Guglielmo X di Aquitania |
| William-Adolphe Bouguereau | William-Adolphe Bouguereau |
| William-Jordan | Guglielmo Giordano di Cerdanya |
| Williams | Williams |
| Williams syndrome | Sindrome di Williams-Beuren |
| Willibrord | San Villibrordo |
| Willie Brown | Willie Brown |
| Willie Dixon | Willie Dixon |
| Willie Nelson | Willie Nelson |
| Willigis | Villigiso |
| willing | disposto |
| willing or unwilling | volente o nolente |
| Willingen | Willingen |
| Willinghusen | Willinghusen |
| willingly | volentieri |
| willingness to please | cortesia |
| Willingshausen | Willingshausen |
| Willington Quay | Willington Quay |
| Willis Carrier | Willis Haviland Carrier |
| Willis Reed | Willis Reed |
| Willisau | Willisau |
| Willkau-Hasslau | Willkau-Hasslau |
| Willmars | Willmars |
| Willmering | Willmering |
| willow | salice |
| willow herb | epilobio |
| Willow ptarmigan | Lagopus lagopus |
| Willow Rosenberg | Willow Rosenberg |
| willow tree | salice |
| Willow Warbler | Phylloscopus trochilus |
| willpower | forza di volontà |
| Wills | Will |
| Willstätt | Willstätt |
| willy | pisello |
| Willy Brandt | Willy Brandt |
| Willy Fritsch | Willy Fritsch |
| Willy Puchner | Willy Puchner |
| Willy Sagnol | Willy Sagnol |
| willy-nilly | volente o nolente |
| Willys | Willys-Overland |
| Willys MB | Willys MB |
| Wilma | Wilma |
| Wilma Montesi | Omicidio di Wilma Montesi |
| Wilma Rudolph | Wilma Rudolph |
| Wilmer Valderrama | Wilmer Valderrama |
| Wilmersdorf | Wilmersdorf |
| Wilmington | Wilmington |
| Wilno Voivodeship | Voivodato di Vilnius |
