He was the grandson of Taksony. His father was Michael (Mihály), Duke between Morava (March) and Esztergom (Hron or Gran) (– ca 978 or bef. 997) and his mother was Michael's wife Adelajda of Poland (– aft. 997), daughter or sister of Mieszko I of Poland. His brother was Ladislaus the Bald. He was a cousin of Stephen I of Hungary. He took part in a conspiracy aimed at murdering king Stephen. As a result of the failed assassination attempt, he was excluded from the royal succession in favour of Peter Orseolo. As punishment for his treason, Vazul had his eyes gouged out at Nitra Castle and molten lead poured in his ears and his sons were exiled.
