Last name Hirny (Hirny 
) , in all the world, is a rare cognomen. The last name Hirny is characteristic of Poland, where it is a rare surname, Argentina, where it is a very rare surname, and the United Kingdom, where it is an extremely rare surname. Not in comparison with a country's population, it is the most numerous in Poland, the United States, and Argentina. Likewise, Hirny is the forename as well as the last name.