A nephew of the Cid. The name is documented in historical sources.
Away went Alvar Fanez, and Alvar Alvarez with him, and Alvar Salvadores, and Galin Garcia, and the two hundred horsemen; and the Cid remained in ambush with the rest of his company.
There was my Cid, the good man in battle, who fought well upon his gilt saddle; and Alvar Fanez Minaya, and Martin Antolinez the Burgalese of prowess, and Muno Gustios, and Martin Munoz who held Montemayor, and Alvar Alvarez, and Alvar Salvadores, and Galin Garcia the good one of Aragon, and Felez Munoz the nephew of the Campeador.
Alvar Fanez Minaya, and Pero Bermudez, and Martin Munoz, and Martin Antolinez that worthy Burgalese, and the Bishop Don Hieronymo that good one with the shaven crown, and Alvar Alvarez, and Alvar Salvadores, and Muno Gustios that knight of prowess, and Galind Garcia of Aragon; all these and all the others made ready to go with the Cid.
Now the Cid had performed his vigil in the Church of St. Servans, matins and primes were said, and mass performed; and then he made ready to go to the Cortes, and with him went Alvar Fanez Minaya, whom he called his right arm, and Pero Bermudez, and Muno Gustios, and Martin Antolinez that doughty Burgalese, and Alvar Alvarez, and Alvar Salvadorez, and Martin Munoz, and Felez Munoz the Cid's nephew, and Malanda who was a learned man, and Galin Garciez the good one of Aragon: these and others made ready to go with him, being a hundred of the best of his company.