There are two theories about who was her real father, and one holds that Saneyoshi TOKUDAIJI (Kanin lineage within the Fujiwara family) who reached the Court position of Sadaijin (Minister of the Left) was her father while the other speculates that FUJIWARA no Tadamichi (called Hosshoji) of Sekkan-ke (the families which produced Sessho [Regent] & Kanpaku [the Chief Adviser to the Emperor]), who himself became Kanpaku was her father.
実父については、閑院流の徳大寺左大臣実能と、摂関家の法性寺関白藤原忠通の二説がある。