Diego Fernández de Cáceres y Ovando
Diego Fernández de Cáceres y Ovando
( – Monleón, aft.
February 2, 1487) was a Spanish military and nobleman.
Diego Fernández
Diego Fernández was a Spanish adventurer and historian of the 16th century.
Diego Fernández de Villalán
Diego Fernández de Villalán( died 7 Jul 1556) was a Roman Catholic prelate who served as the fourth Bishop of Almería( 1523 – 1556).
Mariana Fernández de Córdoba y Ayala
Mariana Fernández de Córdoba y Ayala( c. 1394 – 1431), also known as" Mariana de Ayala Córdoba y Toledo", was the fourth Lady of Casarrubios del Monte in the province of Toledo.
She was the daughter of Diego Fernández de Córdoba y Carrillo, first Lord of Baena, and Inés Ayala y Toledo, third Lady of Casarrubios del Monte.
Diego Fernández de Cevallos
Diego Fernández de Cevallos Ramos( born 16 March 1941) is a Mexican politician affiliated with the conservative National Action Party( PAN).
He was a presidential candidate in the 1994 election and President of the Mexican Senate.
Diego Fernández de la Cueva, 1st Viscount of Huelma
Diego Fernández de la Cueva, 1st Viscount of Huelma( died 26 November 1473) was a Spanish nobleman.
Guillermo Fernández de Soto
Guillermo Fernández de Soto
Diego Fernández de Oviedo
Diego Fernández ("fl." 1020 – "c." 1046), also known as Diego Fernández de Oviedo, was a member of one of the most noble lineages of the Kingdom of León as the son of Fernando Flaínez and Elvira Peláez, daughter of count Pelayo Rodríguez.
He was the second cousin of King Alfonso VI since both shared the same great-grandfather, Count Fernando Bermúdez de Cea.
Distinguished with the title of Count at an early age, Diego was the father of Jimena Díaz, wife of Rodrigo Díaz de Vivar "El Cid".
Diego Fernández de Ovando
" Fray" Diego Fernández de Ovando was a Spanish military and nobleman.
Fernando Flaínez
Fernando Flaínez (fl.) 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 Vivar "El 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 of León until 1038 when the kingdom was already under the control of King Sancho III of Pamplona.

Question: Who is the paternal grandfather of Diego Fernández De Oviedo?
Answer: Flaín Muñoz