Surname Seifeddin (Seifeddin 
, Сейфеддин 
) , in the world, is a rare last name. The last name Seifeddin is characteristic of Lebanon, where it is quite a rare surname, Tunisia, where it is a rare surname, and Algeria. Not in comparison with a country's population, it is the most numerous in Lebanon, Egypt, and Algeria. Likewise, Seifeddin is the forename as well as the last name.