According to "Shoku Nihongi" (literally, Chronicle of Japan Continued, which is the second of the six classical Japanese history texts), his secular surname was Ichiki, but in "Fuso ryakki" (literally, A Short History of Japan) he appears as born in Takaichi no kori (or Takaichi-gun) County in Yamato Province under the clan name of Ato.
『続日本紀』によると俗性は市往氏であるが、『扶桑略記』では大和国高市郡の出身で阿刀氏とする。