Her father was Hyobu no Gon no Taifu (the high position equivalent to Dajokan, who dealt with samurai and weapons in the government, based upon the ritsuryo legal system), TAIRA no Tokinobu (Minister of the left, posthumously conferred), and her mother was Chunagon (vice-councilor of state), FUJIWARA no Akiyori's daughter, Sukeko.
父は兵部権大輔・平時信（贈左大臣）、母は中納言・藤原顕頼の娘、祐子（すけこ）。