Cognomen Dourov (Дуров 
, דורוב 
, Dourov 
) , throughout the world, is quite a rare family name. The cognomen Dourov is habitual in Russia, where it is quite a rare surname, Belarus, and Kazakhstan, where it is a rare surname. Not in comparison with a country's population, it is the most numerous in Russia, Ukraine, and Kazakhstan. Very seldom, Dourov is the forename as well as the last name.