He is first recorded with the title of count in a document of 26 September 1119. He appears in documents between 8 May 1107 and 20 June 1124. Cf. Simon Barton (1997), The Aristocracy in Twelfth-century León and Castile (Cambridge: Cambridge University Press), 236–37, which contain a brief curriculum vitae. Bernard F. Reilly (1982) The Kingdom of León-Castilla under Queen Urraca, 1109–1126Diarsipkan 2019-07-03 di Wayback Machine. (Princeton: Princeton University Press), 219, states that though Fernando was "a person of considerable influence in the realm, [he] seems not to have been a regular member of the court. Only nine of the queen's charters bear his confirmation."
He is first recorded with the title of count in a document of 26 September 1119. He appears in documents between 8 May 1107 and 20 June 1124. Cf. Simon Barton (1997), The Aristocracy in Twelfth-century León and Castile (Cambridge: Cambridge University Press), 236–37, which contain a brief curriculum vitae. Bernard F. Reilly (1982) The Kingdom of León-Castilla under Queen Urraca, 1109–1126Diarsipkan 2019-07-03 di Wayback Machine. (Princeton: Princeton University Press), 219, states that though Fernando was "a person of considerable influence in the realm, [he] seems not to have been a regular member of the court. Only nine of the queen's charters bear his confirmation."