Adalbert is the ancestor of the two comital lines of Dillingen and Kyburg. Hartmann III of Dillingen acquired territory from the inheritance of the Counts of Lenzburg in 1173. He founded the cities of Diessenhofen (1178), Winterthur (1180) and possibly Frauenfeld. After the death of his brother Adalbert II in 1170 he again unified the family territories until his own death in 1080. After 1080, the counties of Dillingen and Kyburg remained separate. His son Adalbert III continues the Dillingen line and his son Ulrich the Kyburg line. Adalbert III participated in the Third Crusade, and he sided with Philip of Swabia in the feud against Wittelsbach. He is succeeded by his son Hartmann IV, who in 1246 sides with "anti-king" Henry Raspe. In reaction, Conrad IV invades Dillingen in 1246, 1247 and again in 1249   Adalbert IV, son of Hartmann IV, was the last count of Dillingen. He is mentioned as "illustris nunc comes de Dilingen" in 1255. He died without an heir in 1257, and the fief reverted to the empire, and was given to  Louis II, Duke of Bavaria by Richard of Cornwall in 1261.