Since Toshiatsu had no heir (Toshihiro, his legitimate son died young), he adopted Toshii DOI, the fourth son of Toshitoku DOI, the lord of Kariya Domain in Mikawa Province which was a branched family of the DOI family.
利厚には跡継ぎがいなかったため（嫡子の利広は早世）、分家の三河国刈谷藩から藩主・土井利徳の四男・土井利位を養嗣子に迎えた。