The family originated with Tamesuke REIZEI (whose mother was Abutsuni, priestess Abutsu and the author of "Izayoi Nikki"), who was the son of FUJIWARA no Tameie (the son of FUJIWARA no Sadaie).
藤原為家（藤原定家の子）の子である冷泉為相（母は『十六夜日記』で有名な阿仏尼）から始まる。