Meaning

noun (Norse mythology) wife of Thor and guardian of the home

originFrom Old Norse, from sif (“kindred, kinswoman”), from Proto-Germanic *sibjō; see also Old English sibb (“kinship”) (whence Middle English sib (“having kinship; kinsmen”), whence English sib, sibling), German Sippe (“tribe”).

Etymology from Wiktionary, CC BY-SA 3.0