Cognomen Lalko (Lalko 
) , in the entire world, is a rare last name. The last name Lalko is habitual in Latvia, where it is a rare surname, Poland, and the United States, where it is a very rare surname. Not in comparison with a country's population, this name is the most popular in the United States, Poland, and Argentina. Likewise, Lalko is the forename as well as the last name.