Walter Alison Phillips, 1911 Encyclopædia Britannica, Volume 15… (1911)
“ The older story, according to which Grîmhild slays her husband Attila in revenge for her brothers, is preserved in the Norse tradition, though Grîmhild’s part is played by Gudrun, a change probably due to the fact, mentioned above, that the name Grîmhild still retained in the north its sinister significance. The name of Grîmhild is transferred to Gudrun’s mother, the “wise wife,” a semi-daemonic figure, who brews the potion that makes Sigurd forget his love for Brunhild and his plighted troth. ”
