Family name Mrav (Мрав 
, Mrav 
, Nrav 
) , throughout the world, is a rare last name. The family name Mrav is habitual in Serbia, where it is quite a rare surname, Hungary, where it is a rare surname, and Armenia. In absolute terms, it most frequently occurs in Serbia, Hungary, and India. Much less frequently, Mrav is the forename as well as the last name.