According to "Sonpi Bunmyaku" (a text compiled in the fourteenth century that records the lineages of the aristocracy), however, Prince Masamochi was given the title of TAIRA no Ason and became 'TAIRA no Masamochi.'
ただし、『尊卑分脈』は雅望王が平朝臣を賜って「平雅望」となったとする。