Last name Яркко (Jarkko 
, Яркко 
) , in all the world, is a rare surname. The last name Яркко is habitual in Finland, where it is quite a rare surname, Latvia, where it is a rare surname, and Austria. Not in comparison with a country's population, it is the most numerous in Finland, the United States, and Austria. More prevalently, Яркко is the forename as well as the last name.