Cognomen Gandja (Gandja 
, Ганджа 
) , around the world, is a rare family name. The last name Gandja is characteristic of Ukraine, where it is a rare surname, Russia, and Kazakhstan, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Ukraine, Russia, and France. Much less frequently, Gandja is the forename as well as the last name.