Cognomen Aldahr (الضاهر 
, Aldahr 
) , all over the world, is quite a common family name. The last name Aldahr is characteristic of Western Asia, particularly Syria, where it is quite a common surname, Lebanon, where it is quite a rare surname, and Bahrain. In absolute terms, this name is the most popular in Syria, Lebanon, and Egypt. Much less frequently, Aldahr is the forename as well as the last name.