Surname Ladja (Ladja 
) , around the globe, is quite a rare last name. The last name Ladja is habitual in Philippines, where it is quite a rare surname, Malaysia, where it is a rare surname, and Qatar. Not in comparison with a country's population, the name is most common in South-eastern Asia, particularly Philippines, Indonesia, and Malaysia. Very seldom, Ladja is the forename as well as the last name.