Last name Dekoun (Декун 
, Dekoun 
) , all around the world, is a rare family name. The family name Dekoun is characteristic of Benin, where it is quite a rare surname, Algeria, where it is a rare surname, and Ukraine. Measured by absolute frequency, it most frequently occurs in Benin, Russia, and Algeria. Much less frequently, Dekoun is the forename as well as the last name.