Cognomen Natja (Natis 
, Natja 
, Natica 
) , all over the world, is a rare family name. The cognomen Natja is habitual in Greece, where it is a rare surname, Panama, and Bulgaria. Not in comparison with a country's population, this name is the most popular in Indonesia, Brazil, and Greece. More frequently, Natja is the forename as well as the last name.