However, her identity is unclear, and there are various theories about it such as a relative of TAIRA no Kunitae who was a maternal relative of his father Tsunekiyo, the Jo clan (Taira clan) in Echigo Province, the Iwaki clan (Kaido-Taira clan), the Daijo clan in Hitachi Province, or a member of the Taira clan in Kyoto, but none of them is decisive.
しかし出自に関しては明らかではなく、父経清の母方である平国妙の縁者、越後国城氏(平氏)、海道平氏岩城氏、常陸国大掾氏、都の平氏の誰かなど諸説があるがどれも決め手には欠ける。