Cognomen Cuèllar (Cuèllar 
) , throughout the world, is a very rare surname. The last name Cuèllar is characteristic of Latin America and the Caribbean, particularly Bolivia, where it is a rare surname, Colombia, where it is a very rare surname, and Peru, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Latin America and the Caribbean, particularly Bolivia, Colombia, and Mexico.