She is said to have been the daughter of TAIRA no Tsunekata, Jugoinojo (Junior Fifth Rank, Upper Grade), Minbu taifu (Senior Assistant Minister of Popular Affairs), Togu no suke (Assistant Master in the Crown Prince's Quarters), or even the very same woman as 堀河院御乳母典侍紀伊三位師子 who was the daughter of FUJIWARA no Moronaga, but her real father is still unknown.
従五位上民部大輔春宮亮平経方の娘とも、藤原師長の娘である堀河院御乳母典侍紀伊三位師子と同一人物ともいわれており父親は定かではない。