Fernando Flaínez was a powerful magnate from the Kingdom of León, member of the aristocratic lineage of the Flaínez. His parents were Flaín Muñoz and his wife Justa Fernández, daughter of count Fernando Bermúdez de Cea. He was the paternal grandfather of Jimena Díaz, wife of Rodrigo Díaz de VivarEl Cid, and the direct ancestor of the important medieval noble lineage of the Osorios. He married Elvira Peláez, daughter of Pelayo Rodríguez and Gotina Fernández de Cea, with whom he had at least seven children: Flaín, Oveco, Justa, Pedro, Pelayo, Muño and Diego. He was the tenente of Aguilar and documented with the title of count as of 1028. Jointly with his son, Flaín Fernández, he governed the city ofLeón until 1038 when the kingdom was already under the control of King Sancho III of Pamplona.
Biographical sketch
He first appears in medieval charters in 999 when, jointly with his brother Munio, confirmed a donation by the Bishop of León to the Monastery of Sahagún. On 26 February 1020, he and his wife accompanied by several of his children founded the Monastery of San Martín de Pereda in Valle de Valdeburón which was subsequently incorporated in the Monastery of Benevívere. In this document, he mentions that he had inherited several of the properties being donated from Fredenando Uermudiz et Flanio Moniz, his grandfather and father, respectively. As a loyal vassal of King Alfonso V of León, he appears constantly confirming royal charters and was honored with the title of count at the end of the reign of Alfonso and at least from 1028. After the death of Alfonso V and the succession to the throne by Bermudo III of León, Fernando supported his first cousin King Sancho III of Navarre, although, at first, he accompanied the young monarch as evidenced in a donation made by Bermudo III in November 1028 to the Cathedral of Santiago de Compostela where he appears with other magnates confirming the royal charter. His presence in the curia regis of King Bermudo III was infrequent from 1029 until 1035 and this absence could be attributed to his involvement — active or behind the scenes — in the assassination of García Sánchez, Count of Castile in 1029 when García went to the city of León to meet Sancha, his promised bride and future wife of King Ferdinand I of León. He was back at the court of Bermudo III to whom he remained faithful until the king was killed in the Battle of Tamarón in 1037. Fernando Flaínez did not hand over the capital of the Kingdom of León to Ferdinand I until 1038 and kept all his honors and estates until his death, after 1049, the last year in which he appears in the charters of the Monastery of Sahagún.
Marriage and issue
He married his first cousin, Elvira Peláez, daughter of Count Pelayo Rodríguez and Countess Gotina Fernández, another daughter of Fernando Bermúdez de Cea, and as such, also a sister of Queen Jimena and of Justa Fernández, Fernando's mother. They were the parents of the following children, all except Justa born before February 1020, the date on which they appear confirming the donation made by their parents:
Flaín Fernández, a count, husband of Toda Fernández and father of Martín Flaínez, ancestors of the Osorio;
Oveco Fernández, married to Onecca Gutiérrez;
Pedro Fernández
Pelayo Fernández, royal alférez in 1039 and in 1050 and count as from 1043. He could have been the father of Flaín Peláez;
Munio Fernández, also a count, married Elvira Peláez, daughter of Count Pelayo Froilaz the Deacon and Aldonza Ordóñez, daughter of the infantes Ordoño Ramírez and his wife Cristina Bermúdez. They were the parents of Countess Aldonza Muñoz, the wife of Count Vela Ovéquiz. He last appears in June 1049 with his brother Pelayo;
Diego Fernández, the father of Jimena Díaz, wife of El Cid;
Justa Fernández, named after her paternal grandmother, Justa was the second wife of Count Ansur Díaz and step-mother of powerful count Pedro Ansúrez On 29 September 1047, Justa and her husband founded the Monastery of San Román.
