1771, from phonetic spelling of Irish bean sidhe "female of the Elves," from bean "woman" (from PIE *gwen-; see queen) + sidhe, from sith "fairy" or sid "fairy mound." Specifically, one who calls to the spirits of the dead. Sidhe sometimes is confused with sithe, genitive of sith "peace."[banshee etymology, banshee origin, 英语词源]