Last name Yashko (Яшко 
, Yashko 
) , globally, is a rare cognomen. The cognomen Yashko is characteristic of Eastern Europe, particularly Bulgaria, where it is a rare surname, Belarus, where it is a very rare surname, and Ukraine. Not in comparison with a country's population, the name is most common in Russia, Ukraine, and the United States. Very seldom, Yashko is the forename as well as the last name.