It is said that Tsunanori TOKUGAWA, who was married to Tsunayoshi's daughter, Tsuruhime, was nominated as the successor but Mitsukuni TOKUGAWA objected.
娘の鶴姫を嫁がせていた徳川御三家の紀州徳川家の徳川綱教が候補に上がったが徳川光圀が反対したという説もある。