Wæl-gæst
Bosworth & Toller Anglo-Saxon Old English Dictionary - wæl-gæst
According to the Old English Dictionary:
(-gǽst?), es;
- wæl-gæst
- m. A deadly guest (spirit?), a murderous guest :-- Wælgaest (Grendel), Beo. Th. 3994; B. 1995: (Grendel's mother), 2666; B. 1331. wæl-gæst,wæl-