Beowulf is a legendary Geatish hero in the eponymous epic poem, one of the oldest surviving pieces of English literature.

Grendel's mother is one of three antagonists in the anonymous Old English poem Beowulf, the other two being Grendel and the dragon. Each antagonist reflects different negative aspects of both the hero Beowulf and the heroic society that the poem is set in. Grendel's mother is introduced in lines 1258b to 1259a as: "Grendles modor/ides, aglæcwif".