Furthermore, MINAMOTO no Morofusa (a child of Imperial Prince Tomohira) became the Yushi of FUJIWARA no Yorimichi, who was the husband of his older sister and Kanpaku (chief adviser to the Emperor) with his surname of Minamoto unchanged, but the record of that time described him as the "adopted child with different surname" ("Shoyuki"[the diary of FUJIWARA no Sanesuke]).
また、具平親王の子・源師房は源氏の姓のまま姉婿である関白藤原頼通の猶子になったが、当時の記録では「異姓の養子」（『小右記』）と書かれている。