 Besides the apocryphal charters, there are genuine, posthumous documents referring to Alfonso as emperor.In one that dates from 917, in the reign of his son Ordoño II of León, the king confirms as "Ordoño, son of the Emperor Alfonso the Great" ("Ordonius, filius Adephonsi Magni imperatoris").A document from 950 can also be cited that refers to Alfonso with the imperial title.