The Fujiwara clan was descended from NAKATOMI no Kamatari, who had been awarded an official status title (called Uji-Kabane) 'FUJIWARA no Asomi' from Emperor Tenji for his outstanding contributions to Taika-no-kaishin (the Taika Reform).
中臣鎌足が大化の改新の功により天智天皇より賜った氏カバネ「藤原朝臣」を姓とする氏族である。