Cognomen Zä (Zä 
) , all around the world, is quite a rare family name. The surname Zä is characteristic of Northern Africa, particularly Algeria, where it is quite a rare surname, Tunisia, where it is a rare surname, and Morocco. Not in comparison with a country's population, it is the most numerous in Northern Africa, particularly Algeria, Egypt, and Morocco. Likewise, Zä is the forename as well as the last name.