Last name זם (Zem 
, Zamm 
, זם 
) , globally, is quite a common cognomen. The cognomen זם is habitual in Northern Africa, particularly Algeria, where it is quite a rare surname, Tunisia, and Egypt, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Algeria, Brazil, and Egypt. Very seldom, זם is the forename as well as the last name.