According to the "Jogu Shotoku Hoo Teisetsu" (Biography of Shotoku Taishi), Umayato no Toyotomimi no Shotokuhoo had children including Yamashiro no Oe no O.
また、『上宮聖徳法王帝説』などでは厩戸豊聰耳聖徳法王の子に山代大兄（山背大兄王）らがいるという。