Berthold II of Swabia
…1111), also known as Berchtold II, was the Duke of Swabia from 1092 to 1098. After he conceded the Duchy of Swabia to the Staufer in 1098, the title of "Duke of Zähringen" was created for him, in use from c. 1100 and continued by his successors until 1218. Berthold was a younger son of Berthold I of Zähringen, and he…