Simón Narciso Díaz Márquez (August 8, 1928 – February 19, 2014), also known as tío Simón, was a Venezuelan singer, actor, TV host, comedian, and Grammy Award-winning composer of Venezuelan music. Some of his most popular songs include Caballo viejo, Tonada de luna llena and La vaca Mariposa. Díaz endeavored to recover the folklore and musical traditions of the Venezuelan llanos (plains). This style of music has since been performed by artists such as Argentina's Mercedes Sosa, Brazil's Caetano ...