Since his juvenile name was 'Ushikai' (lit. cow keeper), his family was called 'Ushikai warawa' (cow keeping boys) who handled cow carts as 'Ushitsuki' ("Okagami").
実頼の幼名が「牛養（うしかい）」であったため、実頼の一族は牛車の牛を扱う「牛飼童（うしかいわらわ）」のことを、「牛つき」と呼んだ（『大鏡』）。