Some point out that TANAHE no Osumi could be related by birth to TANABE no Fubito Osumi, Menoto (wet nurse) of FUJIWARA no Fuhito, whose name appears in "Sonpibunmyaku," because of the similarity between their names.
なお、苗字や名前の類似性などから、『尊卑分脈』に見える藤原不比等の乳母・田辺史大隅との血縁関係が指摘されている。