However, there was no strict rule on that myoji (family name) and honsei (original name) had to be different as these examples show: in the cases of the Miyatsuko family of Kii Province, and the Tsumori family, the honsei (original name) existed but they had no myoji (family name), on the other hand, the Minamoto clan, the line of MINAMOTO no Yoshitaka (Sahyoe no gon no suke [provisional assistant captain of the Left Division of Middle Palace Guards]), the sei (surname) and myoji (family name) were the same, and therefore, it is impossible to conclude what was the myoji of the head family of TOYOTOMI.
が、当時の紀伊国造家や津守氏のように本姓はあっても名字の存在しない家や、源義高(左兵衛権佐)流源氏のように姓と名字が同一の例も存在するなど、名字と本姓が必ず別であるという規則は無いこともあり、豊臣宗家の名字を断定することは出来ない。