William V, Count of Nevers (fl. 1175–1181) William V, Duke of Aquitaine (969–1030) William V, Duke of Bavaria (1548–1626) William V, Duke of Jülich (1299–1361) William V, Landgrave of Hesse-Kassel (1602–1637) William V, Marquess of Montferrat (c. 1115–1191) William V, Prince of Orange (1748–1806) William V of Holland (disambiguation) William V of Jülich-Berg (1516–1592) William V of Montpellier (1075–1121)