He had no wife and no child, but Ryojo OISHI, a son of Nobukiyo's cousin, Yoshimaro OISHI, was adopted, and Ryojo's descendants have kept the family name of Sezaemon Nobukiyo until today.
妻も子もなかったが、従兄弟にあたる大石良麿の子大石良饒が養子に入り、瀬左衛門信清家の家名を今日まで残している。