Family name Ëm (Ëm 
) , around the world, is quite a rare cognomen. The surname Ëm is habitual in Northern Africa, particularly Tunisia, where it is quite a rare surname, Algeria, and Libya, where it is a rare surname. In absolute terms, it is commonest in Northern Africa, particularly Algeria, Egypt, and Tunisia. Likewise, Ëm is the forename as well as the last name.