Family name Hertsen (Герцен 
, Hertsens 
, Hertsen 
) , in the world, is quite a rare surname. The last name Hertsen is characteristic of Belgium, where it is quite a rare surname, Kazakhstan, and Slovakia, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Russia, Belgium, and Kazakhstan. Very seldom, Hertsen is the forename as well as the last name.