Doton was said to be the child of Sadatsugu YASUI, but there is also the opinion he was not originally from the Yasui clan but was Doton NARIYASU from the Nariyasu clan of Hirano Ward.
なお、道頓は、安井定次の子とされてきたが、安井氏の出身ではなく、平野区の成安氏出身の成安道頓（なりやすどうどん）ではないかとする見解もある。