Surname Diogen (Diogen 
, Диоген 
, Діоген 
) , in the world, is a very rare cognomen. The cognomen Diogen is habitual in Georgia, where it is a rare surname, Greece, where it is a very rare surname, and Israel. Measured by absolute frequency, it most frequently occurs in Georgia, Greece, and Venezuela. More prevalently, Diogen is the forename as well as the last name.