Another case was TAIRA no Kiyokuni who was the child of FUJIWARA no Kunitsuna, became the Yushi of TAIRA no Kiyomori, and then changed his surname to TAIRA.
また、藤原邦綱の子の平清邦のように平清盛の猶子になってそのまま平氏に姓を改めた例もある。