The Okubo clan in Mikawa Province, a vassal of the Tokugawa clan is said to be a descendant of the Utsunomiya clan as well, and the genealogy of the Okubo family shows that the clan was descended from Yasufuji UTSUNOMIYA, a son of Tokikage TSUNOMIYA who was a son of Yasumune UTSUNOMIYA (Yasumune TAKESHIGE), a younger brother of Sadatsuna UTSUNOMIYA.
徳川氏の家臣の三河国の大久保氏も宇都宮氏後裔といい、大久保系図によると、宇都宮貞綱の弟の宇都宮泰宗（武茂泰宗）の子の宇都宮時景の子の宇都宮泰藤を祖とするという。