Friedrich, Graf von Sülichen
Friedrich, Count of Süllichen is allegedly the father of Burkhard I. Friedrich was probably a Count in the Sülichgau area. He is likely to have been the son of Hesso I and Hiltgart. He was brother to Hesso II im Süllichgau.
His significance lies primarily in the fact that he is likely to be one of the earliest predecessors to the heads of the house of Hohenzollern, of which the Burgraves of Nuremberg, the Electors of Brandenburg, the Kings of Prussia, and the German Emperors were all part, and which still survives today. The next documented member of the dynasty is Burkhard I von Zollern.