Cognomen Еленко (Еленко 
, Elenko 
, Yelenko 
) , worldwide, is a rare last name. The surname Еленко is habitual in Bulgaria, where it is quite a rare surname, North Macedonia, where it is a rare surname, and Georgia. Measured by absolute frequency, it is commonest in Bulgaria, Russia, and Georgia. Also, Еленко is the forename as well as the last name.