William (I) (1533-1584), Prince of Orange, Count of Nassau(-Dillenburg), Lord of Egmond, Count of Buren, founder of the House Orange-Nassau (and so known as William of Orange-Nassau), Stadholder of Holland, Zeeland and Utrecht, later Stadholder of Friesland, best known as William the Silent (In Dutch: "Willem de Zwijger"), also known as father of the fatherland (In Dutch: "vader des vaderlands"), Wilhelmus van Nassouwe (as in the Dutch National Anthem composed in his honour), and somewhat ambiguously as William I and as William I of Orange-Nassau.

William I of the Netherlands, also known as William Fredrik of Orange-Nassau or William VI of Orange before his accession.

William III of the Netherlands.

William II of the Netherlands (The Prince of Orange who fought at the Battle of Waterloo, sometimes known as William VII)

William IV of Orange-Nassau

William V of Orange-Nassau

Saint William of Gellone (755-c.812), legendary courtier of Charlemagne who defeated the Saracens at Orange, is often called William of Orange.

William II of Orange-Nassau

William of Orange (Dutch: Willem van Oranje, French: Guillaume d'Orange, German Wilhelm von Oranien, Latin Guilelmus) is the name of several historical persons. In the context of Irish and British history, it refers most often to King William III of England; in the context of Dutch history, it is usually in reference to William the Silent. Those men who may be referred to as William of Orange may be grouped together as shown in this article.

William, Bishop of Orange joined the First Crusade. After the death of Adhemar of Le Puy, he was recognized as leader of the clergy, until he himself died six months later in December of 1098.

William III of Orange-Nassau, (1650-1702), also king of England a.k.a. King William III of England, King William II of Scotland, "King Billy", and William Henry (In Dutch: "Willem Hendrik")

Willem-Alexander, Crown Prince of the Netherlands, the current heir apparent, as eldest son of Queen Beatrix. With his accession of the Dutch throne he will probably be named William IV of the Netherlands.

William of Orange was also the name of a pigeon used by British military in Battle of Arnhem in September 1944.