Cognomen Jancevič (Янцевич 
, Jancevič 
) , throughout the world, is quite a rare family name. The surname Jancevič is habitual in Belarus, where it is quite a rare surname, Ukraine, where it is a rare surname, and Lithuania. Not in comparison with a country's population, the name is most common in Eastern Europe, particularly Belarus, Russia, and Ukraine. Very seldom, Jancevič is the forename as well as the last name.