The Genji clan, which originated from the Emperor Uda Family, is called Uda-Genji; those who came from the Genji group of FUJIWARA no Inshi's daughter, Imperial Prince Atsumi, had the most power.
宇多天皇から出た源氏を宇多源氏といい、藤原胤子の子・敦実親王から出た系列が最も栄えた。