 Francis I married Hungarian countess Helen Zrínyi in 1666 and had three children, György (1667); Julianna Borbála (1672–1717); and Francis II (1676–1735).He soon joined the Wesselenyi Conspiracy as a result of his marriage to Zrínyi.He became the leader of this group and attempted to stage an uprising among Hungarian nobles, but this was poorly organized and was soon crushed by the Austrian government.