Surname Kaab (كعب 
, Kaab 
, Gaff 
) , all over the world, is quite a common cognomen. The surname Kaab is habitual in Iran, where it is quite a rare surname, Morocco, and Tunisia. Not in comparison with a country's population, it is the most numerous in Iran, the United States, and Morocco. Very seldom, Kaab is the forename as well as the last name.