Members from the Minamoto clan appointed to Udoneri were called Gennai, members from the Taira clan appointed to Udoneri were called Heinai, and members from the Fujiwara clan appointed to Udoneri were called Tonai.
源氏で内舎人に任ぜられた者は源内、平氏で任ぜられた者を平内、藤原氏で任ぜられた者を藤内と呼んだ。