However, there are many corroborated materials to support the former theory, while there are none to support the latter except a note on Ninsonshi Gyohen about the genealogy of Daigo-Genji (Minamoto clan) collected in "Sonpi Bunmyaku" (a text compiled in the fourteenth century that records the lineages of the aristocracy).
しかし、前者を支持する説には多くの証拠資料があるのに対し、後者を支持する説には『尊卑分脈』醍醐源氏系図の任尊子行遍への注以外（「新古作者」と記載）にこれといって証拠となる資料がない。