Descendants of Ogura-o (Prince Ogura) and Ishiura-o (Prince Ishiura) who were sons of Mihara no Okimi, flourished as the Kiyohara clan, including famous poets such as KIYOHARA no Fukayabu, KIYOHARA no Motosuke and Sei Shonagon.
王の王子小倉王・石浦王の子孫は清原氏として栄え、清原深養父・清原元輔・清少納言等高名な歌人がいる。