The ruler (caliph) of Baghdad, with whom Gahmuret took service in Wolfram’s Parzifal.
In actual fact, the potentate denoted was the Caliph of Baghdad, head of Islam in the Middle Ages, an anachronism since the Arthurian period predated Mohammed and the foundation of the Caliphate. The title Baruc seems to come from the Hebrew personal name Baruch. In the Livre d’Artus, Baruc is the name of a knight.
In Wolfram’s Parzival, this Middle-Eastern leader captured the city of Niniveh from King Ipomidon. In return, the Baruc was invaded by Pompeius’s and Ipomidon’s Babylonians, but was assisted, for a time, by Perceval’s father Gahmuret.
Parzival | Wolfram von Eschenbach, 1200-1210