The Iwaya family came from the clan of doctors served the Minakuchi Domain, Omi Province (Koga City, Shiga Prefecture) but it is still unknown whether the relationship between the Ozaki/Yokoo family and Iwaya family for generations started from the natural father of Iwao Yokoo who was the chief of Ano county.
なお巌谷家は近江国水口藩（滋賀県甲賀市）藩医の家柄であるが、尾崎・横尾家と巌谷家の代々の関係が、安濃郡長の横尾石夫の実父に始まるものかは未だ不明である。