Don Carlos Gereda y de Borbón, Marquês of Almazán (24 January 1947 – 29 August 2017) was a Spanish aristocrat, engineering entrepreneur and philanthropist.
The youngest son of Nicolás Gereda y Bustamante, his mother María Luisa de Borbón y Pintó was the only daughter of Alberto María de Borbón y d'Ast, 2nd Duke of Santa Elena, making Carlos a descendant of King Charles IV of Spain.Carlos Gereda y de Borbón was the 49th Grand Master of the Paris-Malta obedience of the Order of Saint Lazarus from 2008 until his death, as such succeeding the Duke of Seville and the Duke of Brissac.