Cognomen Rajb (Rajb 
, راجب 
) , across the world, is quite a rare family name. The family name Rajb is characteristic of Libya, where it is quite a rare surname, Syria, and Egypt, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Egypt, Syria, and India. Likewise, Rajb is the forename as well as the last name.