William II

William II may refer to:

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• William II, Duke of Aquitaine (died 926)
• William II, Marquess of Montferrat (died {{c.|961}})
• William II Sánchez of Gascony (died {{c.|996}})
• William II, Count of Provence ({{c.|987}}–1019)
• William II, Count of Besalú (died 1066)
• William II of Normandy ({{c.|1028}}–1087), William I of England
• William II of England ({{c.|1056}}–1100), commonly referred to as William Rufus
• William II, Count of Burgundy (1061–1125)
• William II Jordan (died 1109), Count of Berga, Count of Cerdanya and Regent of Tripoli
• William II, Duke of Apulia (1095–1127), Duke of Apulia and Calabria
• William de Warenne, 2nd Earl of Surrey (died 1138)
• William II, Count of Nevers (1098–1147)
• William II of Bures (died 1158), Crusader lord of the Kingdom of Jerusalem, Prince of Galilee
• William II of Sicily (1155–1189)
• William II, Lord of Béthune (died 1214), nicknamed William the Red
• William II, Count of Perche (died 1226), Bishop of Châlons
• William II of Dampierre (1196–1231)
• William II Longespee ({{c.|1212}}–1250)
• William II of Holland ({{c.|1227}}–1256), Count of Holland and Zeeland
• William de Wickwane (died 1285), Archbishop of York (1279–1285)
• William II, Lord of Egmond (died 1304)
• William II de Soules (died {{c.|1320}}), Lord of Liddesdale and Butler of Scotland
• William II, Earl of Ross ({{r.|1274|1323}})
• William II, Duke of Brunswick-Lüneburg (1300s–1369)
• William II, Count of Hainaut (1307–1345), Count of Holland and Count of Zeeland
• William II, Duke of Athens (1312–1338)
• William II, Duke of Jülich (1327–1393)
• William II, Marquis of Namur (1355–1418)
• William II, Margrave of Meissen (1371–1425)
• William II, Duke of Bavaria ({{r.|1404|1417}})
• William II d'Estouteville (1412–1483), French bishop and cardinal
• William II, Princely count of Henneberg-Schleusingen (1415–1444)
• William II, Duke of Brunswick-Calenberg-Göttingen or William the Younger (1425–1503), Duke of Brunswick-Lüneburg
• William II, Landgrave of Hesse (1469–1509)
• William II de La Marck (1542–1578), Dutch Lord of Lumey and admiral of the Watergeuzen
• William II, Prince of Orange (1626–1650), stadtholder of the United Provinces of the Netherlands
• William II of Scotland (1650–1702), William III of England
• William II, Prince of Nassau-Dillenburg (1670–1724)
• William II, Landgrave of Hesse-Wanfried-Rheinfels (1671–1731)
• William II, Elector of Hesse (1777–1847)
• William II of the Netherlands (1792–1849), Grand Duke of Luxembourg and Duke of Limburg
• William II of Bimbia (died 1882), known as Young King William
• William II of Württemberg (1848–1921)
• William II, German Emperor (1859–1941)