Since Nobutoyo's nickname Tenkyu (Minister of Horses indicated in Chinese) was the same as that of his father Nobushige, Nobushige was called Ko-tenkyu (old Tenkyu) while Nobutoyo was simply called Tenkyu or Go-tenkyu (latter Tenkyu).
父・信繁と通称が同じ典厩のため、父は古典厩、信豊は単に典厩または後典厩と呼ばれている。