William of Orange

William of Orange usually refers to either:

William the Silent, William I, (1533–1584), Prince of Orange, founder of the House Orange-Nassau and the Netherlands as a state
William III of England, William III of Orange-Nassau, William II of Scotland, (1650–1702)

William of Orange may also refer to:

Middle Ages

Saint William of Gellone (755—c.812), courtier of Charlemagne who defeated the Saracens at Orange
William, Bishop of Orange joined the First Crusade. After the death of Adhemar of Le Puy, he was recognized as leader of the clergy

William II, Prince of Orange (1626 – 1650), stadtholder of the United Provinces of the Netherlands from 1647
William IV, Prince of Orange (1711 – 1751), first hereditary stadtholder of the Netherlands
William V, Prince of Orange (1748 – 1806), last Stadtholder of the Dutch Republic and leader of the conservative faction

William I of the Netherlands (1772 - 1843) also known as William Frederik of Orange-Nassau or William VI of Orange before his accession
William II of the Netherlands (1792 – 1849) (The Prince of Orange who fought at the Battle of Waterloo, sometimes known as William VII)
William III of the Netherlands (1817 – 1890), King of the Netherlands and Grand Duke of Luxembourg
William, Prince of Orange, eldest son of William III, died before his father and therefore never succeeded as king
Willem-Alexander, Prince of Orange, current heir apparent, eldest child of Queen Beatrix

William of Orange (pigeon), pigeon used by British military in Battle of Arnhem in September 1944