Family name キゲン (Kigen 
, キゲン) , in all the world, is a common cognomen. The surname キゲン is habitual in Kenya, where it is quite a common surname, Norway, where it is a rare surname, and Japan. Not in comparison with a country's population, it most frequently occurs in Kenya, Japan, and Uganda. More prevalently, キゲン is the forename as well as the last name.