Fernán González (died 970) is the first autonomous count of Castile, son of Gonzalo Fernández de Burgos, who had been named count of Arlanza and the Duero around the year 900, and by tradition a descendant of semi-legendary judge Nuño Rasura.

His mother Muniadona is so well remembered that the later Counts of Castile will sometimes be recorded by Iberian Muslim scholars as Ibn Māma Duna (descendant of Muniadona).