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.
Sigismund, Duke of Bavaria Sigismund of Bavaria (26 July 1439 – 1 February 1501) was a member of the Wittelsbach dynasty. He ruled as Duke of Bavaria-Munich from 1460 to 1467, and then as Duke of Bavaria-Dachau until his death.