Gaspar Fernandes (sometimes written Gaspar Fernández, the Spanish version of his name) (1566-1629) was a Portuguese-Mexican composer and organist active in the cathedrals of Santiago de Guatemala (present-day Antigua Guatemala) and Puebla de los Ángeles, New Spain (present-day Mexico). In 1606, Fernandes was approached by the dignitaries of the cathedral of Puebla, inviting him to become the successor of his recently deceased friend Pedro Bermúdez as chapel master. He left Santiago de Guatemala on 12 July 1606, and began his tenure in Puebla on 15 September. He remained there until his death in 1629. One of his most important achievements for posterity was the compilation and binding in 1602 of various choir books containing Roman Catholic liturgical polyphony, several of which are extant in Guatemala. No portrait of Fernandes has survived.