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William III or William the Third may refer to:
Kings
Nobles
William III, Duke of Aquitaine (913–963)
William II, Count of Provence , also numbered William III of Provence, (late 980s–1018)
William III, Count of Toulouse , also styled William III of Provence (
c. 970 –1037)
William III of Provence (died after 1037)
William III of Weimar (died 1039)
William III, Marquess of Montferrat (
c. 970 –1042)
William III, Lord of Montpellier (died 1058)
William V, Count of Angoulême , also known as William Taillefer III (1084–1118/20)
William III, Count of Burgundy (
c. 1110 –1127)
William III of Forcalquier (died 1129)
William III of Mâcon (1088–1156)
William III, Count of Nevers (
c. 1107 –1161)
William III, Count of Ponthieu (
c. 1093 –1172)
William III, Count of Jülich (
r. 1207–1219 )
William II, Count of Flanders , also styled William III of Dampierre (1224–1251)
William de Cantilupe (died 1254)
William III of Baux (died 1257)
William III Giudice of Cagliari (
r. 1256–1258 )
William III of Geneva (1280-1320)
William I, Count of Hainaut or William III of Holland (
c. 1286 –1337)
William III, Earl of Ross , known as Uillearn , 5th Earl of Ross (died 1372)
William I, Duke of Bavaria or William III of Hainaut (1330–1389)
William III, Duke of Bavaria (1375–1435)
William III of Isenburg-Wied (
r. 1413–1462 )
William III, Princely count of Henneberg-Schleusingen (1434–1480)
William III, Landgrave of Thuringia (1425–1482)
William III, Landgrave of Hesse (1471–1500)
Horses
See also