What is "vazul"

Vazul, or also Vászoly, (before 997–1031 or 1032) was a member of the House of Árpád, a grandson of Taksony, Grand Prince of the Hungarians. Otherwise, the only certain information of his life, that he was kept in captivity and blinded in the fortress of Nyitra (Nitra, Slovakia) in the last years of the reign of his cousin, King Stephen I of Hungary. Modern historians, including György Györffy, do not exclude that he had earlier been Duke of Nyitra. He is the forefather of nearly all Kings of Hungary who reigned after 1046.