Yoshihira was regarded as the eldest son even after Yoshimasa was appointed to the Onmyo no kami, and the child of Yoshimasa, ABE no Narichika might have been adopted from Yoshihira, which strengthens the theory that ABE no Yoshihira was the legitimate son.
この状況は吉昌が陰陽頭に任じられていても変わらず、加えて吉昌の子である安倍成親も吉昌が吉平より譲り受けた養子である可能性もあり、よって安倍吉平が嫡男であるとの見方は未だに強い。