In the "Jogu Shotoku Hoo Teisetsu" and the "Shotoku Taishi Denryaku," the number of men was eight, which was allegedly the origin of another of his names 'Umayado no Toyotoyatsumimi no Miko' (yatsumimi = eight ears.)
『上宮聖徳法王帝説』、『聖徳太子伝暦』では8人であり、それゆえ厩戸豊聰八耳皇子と呼ばれるとしている。