Their exotic names are one of the factors that gave cause to 'the theory of the migrant origins of the Soga clan'; but, as Chiaki MIZUTANI explains, the theory's wide appeal was also underlined by its conformity to historical perception of the Soga clans anti-establishment alignment.
そのことも渡来人説を生み出す要因となっているが、水谷千秋は「蘇我氏渡来人説」が広く受け入れられた背景を蘇我氏を逆賊とする史観と適合していたからではないかと述べている。