There is a relatively strong possibility that he was of the Yoshitada lineage, because even though he belonged to the Seiwa-Genji, he was a too distant relative to both the Mitsumasa lineage and the Mitsuyoshi lineage, which according to the way people thought in those days, probably meant that they weren't of the same family.
そのことから清和源氏でも満政流や満快流では血縁的に遠すぎ、当時の考え方では同族とは言えないことから、義忠流であった可能性が比較的に最も高い。