Cognomen كايبر (Kiber 
, Kuiper 
, Keiper 
) , in the world, is a common last name. The last name كايبر is characteristic of Western Europe, particularly Netherlands, where it is quite a common surname, Germany, where it is quite a rare surname, and Belgium. Not in comparison with a country's population, it most frequently occurs in Netherlands, the United States, and Germany. Very seldom, كايبر is the forename as well as the last name.