Cognomen Alrbab (الرباب 
, Alrbab) , worldwide, is quite a common last name. The family name Alrbab is characteristic of Sudan, where it is quite a common surname, Iraq, where it is a rare surname, and Saudi Arabia. Measured by absolute frequency, it is the most numerous in Sudan, Egypt, and Iraq. Much less frequently, Alrbab is the forename as well as the last name.