Marcelino Valentín Gamazo (1879–1936) was a Spanish lawyer, Secretary of the Bar Association of Madrid on three occasions, Dean of the lawyers of the State and the 64th Attorney General of Spain (Nov–Dec, 1935). He was born in Rubielos Altos on August 14, 1879 and died in El Cerrajón on August 6, 1936. He tried unsuccessfully to condemn the socialist leader, Francisco Largo Caballero, as head of the 1934 Revolution. He was murdered at the beginning of the Civil War.