The origin of the name Reinoso is Castilla, an important and ancient kingdom of Spain.

The name Reinoso derives from the Latin word "regis" which means "real."

Some variations of this family name include: Reyes, Rey, de Reyes, de los Reyes, del Rey, Reina, de la Reina, de Reina, Reinoso, de Reinoso, Reynoso, de Reynoso, Reinosa Reinosa, Reynosa, Real, de Real and others.