What cousin of Herman I, Duke of Swabia also had a chance to rule the Duchy of Franconia?
Herman I, Duke of Swabia Herman I (died 10 December 949) was the first Conradine Duke of Swabia (from 926), the son of Gebhard, Duke of Lorraine, and a cousin of King Conrad I of Germany.
Otto III, Duke of Bavaria Otto III (11 February 1261 – 9 November 1312), a member of the Wittelsbach dynasty, was the Duke of Lower Bavaria from 1290 to 1312 and the King of Hungary and Croatia between 1305 and 1307. His reign in Hungary was disputed by Charles Robert of the Angevin dynasty.