The origin of surname Barrientos is Castilla is an important Christian kingdom of medieval Spain.

Many Spanish names reflect Arabic words or place names because the Muslim occupation of the region over the centuries VIII to XII.

Some variations of this family name include: Barrios, Barrios, Barrio, de Barrio, Barro, Barros, de Barros, Barroso, Barrera, Barreda, de Barreda, Barral, Barreto and more.