Historically, the name "Dracula" is derived from a Chivalric order called the Order of the Dragon, founded by Sigismund of Luxembourg (then king of Hungary) to uphold Christianity and defend the Empire against the Ottoman Turks. Vlad II Dracul, father of Vlad III, was admitted to the order around 1431, after which Vlad II wore the emblem of the order and later, as ruler of Wallachia, his coinage bore the dragon symbol. The name Dracula means "Son of Dracul".