Emperor Ōjin
Genealogy information is supplemented in "Shaku Nihongi" which quotes from the now lost text "Jōgūki" (7th century). It says he was a son of Ushi no Ōkimi (believed to be equivalent to Hikoushi no Ōkimi), a grandson of Ohi no Ōkimi, a great-grandson of Ohohoto no Ōkimi (brother to Emperor Ingyō's consort), a great-great-grandson of Prince Wakanuke no Futamata, and a great-great-great-grandson of Emperor Ōjin.