Surname Ghaj (Ghaj 
) , all over the world, is a very rare family name. The last name Ghaj is habitual in Morocco, where it is a very rare surname, Canada, where it is an extremely rare surname, and the United Kingdom. Not in comparison with a country's population, it is commonest in Morocco, India, and Canada. Much less frequently, Ghaj is the forename as well as the last name.