Gaspar de Zúñiga y Avellaneda (1507 – 2 January 1571) was a Spanish Roman Catholic cardinal and bishop.
[1] He attended the University of Salamanca, where he studied Christian theology under Francisco de Vitoria.
[1] He was appointed to the commission to redact the decrees on the Mass and the sacrament of Holy Orders on 18 July 1558.
[1] He did not attend the close of the Council because he was recalled to Spain to serve as a judge at the cause of Bartolomé Carranza, Archbishop of Toledo.
[1] He accompanied Francisco Diego de Zúñiga, 4th Duke of Béjar and Plasencia to the Holy Roman Empire to accompany Anna of Austria, the daughter of Maximilian II, Holy Roman Emperor, for her impending marriage to Philip II of Spain.