Surname Mordko (Mordko 
, Мордко 
) , in all the world, is a very rare cognomen. The last name Mordko is characteristic of Israel, where it is a rare surname, Poland, where it is a very rare surname, and Argentina, where it is an extremely rare surname. Measured by absolute frequency, it is commonest in Israel, Poland, and Mexico. More prevalently, Mordko is the forename as well as the last name.