Thorsson I., the former Theodore VII., was the head of the Islyn Dynasty, since 2366 duke of Islyn and Ulfmærr, and since 2374 King of the Kings (Kungenes Konge) of Kazulia. He was one of the most important leaders of the God's and the King's Fighters, a Kazulian party, which he refounded, together with Aurelianus Archemid in 2368.