William II

William II may refer to:

* William II of Aquitaine (died 926)
* William II of Montferrat (died c. 961).
* William II Sánchez of Gascony (died after 996).
* William II of Provence (c. 987–1019).
* William II of Besalú (died 1066).
* William I of England (c. 1028–1087), also William II of Normandy.
* William II of England (c. 1056–1100).
* William-Jordan (died 1109), also William II of Cerdanya.
* William II, Duke of Apulia (1095–1127).
* William de Warenne, 2nd Earl of Surrey (died 1138).
* William II of Nevers (1098–1147).
* William II of Bures (died 1158).
* William II of Sicily (1153–1189).
* William II of Dampierre (1196–1231).
* William II Longespee (c. 1204–1250).
* William II of Cagliari (died 1254).
* William II of Holland (1228–1256).
* William II of Villehardouin (died 1278).
* William de Wickwane, Archbishop of York (1279–1285).
* William II de Soules (died c. 1320).
* Uilleam II, Earl of Ross (ruled 1274–1323).
* William II of Athens (1312–1338).
* William II, Count of Hainaut (1307–1345).
* William II, Duke of Bavaria-Straubing (ruled 1404–1417).
* Guillaume d'Estouteville (1403–1483).
* William II, Landgrave of Hesse (1469–1509).
* William II de la Marck (1542–1578).
* William II, Prince of Orange (1626–1650).
* William III of England (1650–1702), also William II of Scotland.
* William II of the Netherlands (1792–1849).
* William II of Bimbia (died 1882), popularly known as Young King William.
* William II of Württemberg (1848–1921).
* William II, German Emperor (1859–1941)
* William II of Agen, 13th century Latin Patriarch of Jerusalem