There is no clear evidence, but Ieyasu, who said he was the descendant of SUGAWARA no Michizane, lived in Oguma Village in Chikugo Province (current Fukuoka Prefecture) for a long time, and then changed the family name to Okuma.
明確ではないが、菅原道真の末裔を称する家泰が筑後国大隈村（現：福岡県）に土着して大隈に改姓。