However, if Yoshitsune had begotten a daughter during his stay in Hirazumi Province, she would have been less than ten years old at the time when she married Aritsuna, who was already a grown-up; as there was big difference in age between them, she was very possibly Yoshitsune's adopted daughter.
しかし義経が平泉時代に娘をもうけたとしても10歳未満であり、すでに成年である有綱とは年齢が合わず、養女の可能性が高い。