Last name Zemny (Zemny 
) , throughout the world, is an extremely rare cognomen. The surname Zemny is characteristic of Latin America and the Caribbean, particularly Honduras, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and Brazil. Not in comparison with a country's population, this name is the most popular in the United States, Brazil, and Honduras. Very seldom, Zemny is the forename as well as the last name.