Family name Sereja (Сережа 
, Серёжа 
, Sereja 
) , in the world, is a rare cognomen. The surname Sereja is characteristic of Moldova, where it is quite a rare surname, Armenia, where it is a rare surname, and Belarus. Not in comparison with a country's population, this name is the most popular in Eastern Europe, particularly Russia, Moldova, and Poland. More frequently, Sereja is the forename as well as the last name.