Yorifusa TOKUGAWA, lord of the Mito Domain of the Tokugawa gosanke (three privileged branches of the Tokugawa family), had been considered to be a branch family of Yorinobu TOKUGAWA (material half-brother), who had the same mother, Yojuin, until 1636 when he was granted the name of Tokugawa.
徳川御三家水戸藩主徳川頼房は1636年（寛永13年）に徳川賜姓されるまで、同じ養珠院を母とする徳川頼宣の分家扱いであった。