This hero is the son of Ecgtheow & the grandson of Hrethel
Hrethel fostered 
Beowulf (his grandson) by taking him into his royal... [DOC] [TLE] A Guide to the Characters and Feuds in Beowulf [PAR] Herebeald Haethcyn Hygelac+Hygd [daughter]+Ecgtheow .... Beowulfson of 
Ecgtheow; nephew of Hygelac; grandson of Hrethel; slayer of Grendel, ... Hama
Gothic hero; stole the Brosingamene (the Brosing Necklace) from Eormenric.