Surname Muñoz-Reja (Muñoz-Reja 
) , worldwide, is a very rare family name. The cognomen Muñoz-Reja is habitual in Southern Europe, particularly Spain, where it is a very rare surname. More frequently, Muñoz-Reja is the forename as well as the last name. Parts of the name also exists independently as a last name Muñoz, and a last name Reja.