Surname Mendax (Mendax 
, Mendaz 
, Mendios 
) , in the world, is a very rare family name. The cognomen Mendax is characteristic of Latin America and the Caribbean, particularly the Dominican Republic, where it is a rare surname, Colombia, where it is a very rare surname, and Ecuador. Not in comparison with a country's population, it is the most numerous in the Dominican Republic, India, and the United States.