In 956, Otto (II) the Salian inherited Nahegau from his father, Conrad the Red, then added Wormsgau, Speyergau, Niddagau and between the Neckar and the Rhine the counties of Elsenzgau, Kraichgau, Enzgau, Pfinzgau and perhaps Ufgau. Otto was Duke of Carinthia from 978 to 985, and after his retirement from Carinthian office was titled "Wormatiensis dux Francorum" ("Frankish duke of Worms"), the first titular dukedom in Germany. His son, Conrad, who succeeded him in Carinthia, was also titled "duke of Worms".