Cognomen Ąb (Ąb 
) , worldwide, is a rare surname. The family name Ąb is characteristic of Northern Africa, particularly Libya, where it is a rare surname, Morocco, and Algeria, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Northern Africa, particularly Morocco, Egypt, and Algeria. Also, Ąb is the forename as well as the last name.