It is also said that Noritsuna TADA, who was the father-in-law of OE no Hiromoto, was from the Tada clan of "Settsu-Genji" (Minamoto clan), and that Noritsuna's daughter and Hiromoto had their child, OE no Chikahiro (the founder of the Sagae clan), but the Noritsuna name can't be found in the Tada clan's genealogy on "Sonpi Bunmyaku" and other historical sources.
また、大江広元の舅であった多田仁綱が摂津源氏多田氏の出身と伝え、仁綱の娘は広元との間に大江親広（寒河江氏の祖）を儲けているが、仁綱の名は『尊卑分脈』等の系図に見えていない。