Cognomen Lahdan (Lahdan 
) , around the world, is a rare family name. The family name Lahdan is characteristic of Bahrain, where it is quite a rare surname, Kuwait, where it is a rare surname, and Malaysia, where it is a very rare surname. In absolute terms, it most frequently occurs in Bahrain, Kuwait, and Nigeria. Very seldom, Lahdan is the forename as well as the last name.