According to the 'Story of KAMO no Tadayuki's teaching the way to his son Yasunori' in the same book, when Tadayuki went to a nobility's residence to purify the residence, Tadayasu took his son with him because his little son, KAMO no Yasunori said that he would like to accompany him.
同じく「賀茂忠行、道を子の保憲に伝えし語」では、忠行がある貴人の家にお祓いに行く時、幼いわが子・賀茂保憲が供をするというので連れて行った。