Mǽg-bana

According to the Old English Dictionary:

an;

mǽg-bana

m. A destroyer of one's kinsmen :-- Hit (surfeiting) biþ mǽgbana, and hit ne murneþ for nánum men, ne for fæder ne for méder ne for bróðer ne for swuster ne for nánum gesibban men, Wulfst. 242, 5. mæg-bana