Duke of Arcos
Gaspar's second wife Teresa Enríquez de Cabrera y Alvarez de Toledo, a widow since 1687, married again on 20 June 1688 Joaquín Ponce de León Lencastre, 7th Duke of Arcos, 7th Duke since 1693, deceased 1729, Duke of Torres Novaes, but there was no issue from this marriage.