Sueko's elder sister, Saeko, married a grandchild of Yataro IWASAKI, the founder of Mitsubishi Zaibatsu, and her daughter Yuriko (niece of Sueko) married Kiyotaka CHINZEI (professor emeritus at Kyoto University), who was included on a list of important figures as a doctor (science) of paleontology.
寿枝子の姉・小枝子は三菱財閥の創業者・岩崎弥太郎の孫に嫁ぎ、その娘・由利子（寿枝子の姪にあたる）は古生物学関連人物一覧で博士(理学)の鎮西清高（京都大学名誉教授）に嫁いでいる。