Cognomen Воробиов (Vorobyov 
, Vorobiov 
, Воробиов ) , all around the world, is quite a rare family name. The family name Воробиов is characteristic of Moldova, where it is quite a rare surname, Azerbaijan, and Estonia, where it is a rare surname. Not in comparison with a country's population, the name is most common in Russia, Poland, and the United States. Very seldom, Воробиов is the forename as well as the last name.