The Ariwara clan originated from Emperor Heizei's Prince, Imperial Prince Abo and Imperial Prince Takaoka's children were demoted from nobility to subject, and they were the clan whose ancestors were from Imperial Family. (Please refer to the Imperial Family members who were demoted from nobility to subject.)
在原氏（ありわらし）は、平城天皇皇子の阿保親王・高岳親王の子男が臣籍降下したことに興る皇別氏族（賜姓皇族参照）。