Wikipedia
Rikiwulf
Rikiwulf ("The rich and powerful wolf" or "The Ruler of the wolves") was a member of the Wulfing dynasty, mentioned in the Beowulf saga. In 880 AD, he sailed with his Viking warriors from Ghent up the river Lys in Flanders, and settled in succession Rikiwulfinga-haim near Tielt, Rekkem near Menin, and Richebourg, Reclinghem, Racquinghem and Erquinghem-Lys in present Artois, France.
He was possibly related to Godfrid, Duke of Frisia who led the Viking raid on Ghent in 880, or his predecessor Rorik of Dorestad who in 860 had received from King Lothar I all the lands north of the river Maas in Friesland.
Reference: Timothy Reuter: The Annals of Fulda, Ninth Century Histories, Vol. II.