Surname Harmus (Harmus 
) , all over the world, is a very rare last name. The family name Harmus is characteristic of Germany, where it is a very rare surname, South Africa, where it is an extremely rare surname, and Malaysia. Not in comparison with a country's population, the name is most common in Germany, India, and South Africa. More prevalently, Harmus is the forename as well as the last name.