The genealogy mentions another daughter of Kiyomori, who was an older sister of TAIRA no Tokuko and became a lawful wife of FUJIWARA no Kanemasa, the Minister of the Left; but if this woman is supposed to be Tokiwa's daughter, then a discrepancy in date arises, and it is thus suspected that an extra woman was added to the genealogy at a later date.
系図にもう一人平徳子の姉で左大臣藤原兼雅室となった清盛の娘があるが、この女子を常盤の娘に擬したところ、のちに年代が合わない事から、もう一人女子を新しく系図に加えた疑いもある。