Cognomen Olenka (Olenka 
, Оленька 
, Оленка 
) , across the world, is a rare surname. The family name Olenka is habitual in Peru, where it is a rare surname, Poland, and Bulgaria. Not in comparison with a country's population, it most frequently occurs in Peru, Brazil, and Indonesia. More prevalently, Olenka is the forename as well as the last name.