Cognomen Dilion (Dilion 
, Дилион 
) , all around the world, is a rare family name. The surname Dilion is habitual in Moldova, where it is quite a rare surname, Romania, where it is a rare surname, and Nicaragua, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Eastern Europe, particularly Romania, Moldova, and Russia. Also, Dilion is the forename as well as the last name.