Cognomen Гертсог (Gertsog 
, Гертсог ) , in the world, is a very rare family name. The surname Гертсог is habitual in Austria, where it is a rare surname, Russia, where it is a very rare surname, and Turkey, where it is an extremely rare surname. In absolute terms, it is the most numerous in Russia, Austria, and the United States. Much less frequently, Гертсог is the forename as well as the last name.