Family name Mrsnik (Mrsnik 
) , in the entire world, is a very rare last name. The cognomen Mrsnik is characteristic of Slovenia, where it is quite a rare surname, Australia, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Slovenia, the United States, and Australia. Much less frequently, Mrsnik is the forename as well as the last name.