Cognomen Zaynullov (Зайнуллов 
, Zaynullov) , all around the world, is a rare family name. The cognomen Zaynullov is habitual in Russia, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. Much less frequently, Zaynullov is the forename as well as the last name.