According to Sampiro, Fernando ("Fredenandi Ansuri filius") was one of the counts of the region of Burgos, the chief city of Castile—the others being Nuño Fernández, Abolmondar Albo, and Diego Rodríguez—who were captured by Ordoño II on the river Carrión in the place called Tebulare or Tegulare ("Tejar" or "Tejares" in Spanish, as yet unidentified) and imprisoned them in León.
San Fernando Valley | Fernando Botero | Fernando Alonso | San Fernando | Fernando de Noronha | San Fernando, Trinidad and Tobago | Fernando de la Rúa | Fernando Henrique Cardoso | Fernando Arrabal | Fernando Álvarez de Toledo, 3rd Duke of Alba | Fernando de la Mora | San Fernando del Valle de Catamarca | San Fernando, California | Fernando Po | Fernando Perez | Fernando González | Fernando Saunders | Fernando Hierro | Fernando Flores | Fernando Ferrer | Fernando Amorsolo | Fernando Álvarez de Toledo | San Fernando, Pampanga | Fernando Vicente | Fernando Perez (baseball) | Fernando Ortega | Fernando Meirelles | Fernando Collor de Mello | Fernando | Fernando Valenzuela |
The earliest reference to Ansur is found in a document dated 4 March 921, wherein he is named with his parents Fernando Ansúrez and Muniadonna in a donation in the vicinity of Burgos to San Pedro de Cardeña.