from The American Heritage® Dictionary of the English Language, 4th Edition
- William III Known as "William of Orange.” 1650-1702. King of England, Scotland, and Ireland (1689-1702), Dutch stadholder (1672-1702), and prince of Orange. Married to Mary, daughter of James II, he was asked by the opponents of James to invade England (1688) and was proclaimed joint monarch with Mary (1689) after James fled.
Sorry, no etymologies found.