Big Sir is Juan Alderete's what?
Juan Alderete Juan Alderete de la Peña (born September 5, 1963) is a Mexican-American musician, best known as the longtime bassist of Racer X and The Mars Volta.
Juan Bigas Moulins Juan Bigas Moulins (1863–1934) was a nineteenth-century Puerto Rican businessman in Ponce, Puerto Rico.