Though the lawful wife of Shigetaka IWAKI was a daughter of Yoshinao SATAKE, this is Yoshinao of the Eastern House of Satake (Genrokuro) and different from Yoshinao of the head family of Satake (Hikojiro) in this article.
岩城重隆の正室は佐竹義直の娘であるものの、佐竹東家の義直（源六郎）であり、本項目の佐竹宗家の義直（彦次郎）とは別人である。