Surname Kosla (Kosla 
) , throughout the world, is quite a rare last name. The family name Kosla is characteristic of Eastern Europe, particularly Poland, where it is quite a rare surname, Czechia, where it is a rare surname, and Bulgaria. Not in comparison with a country's population, it is commonest in Poland, India, and the United States. More frequently, Kosla is the forename as well as the last name.