Surname Келс (Kels 
, Келс 
, Selsus 
) , in the world, is a rare cognomen. The last name Келс is characteristic of Botswana, where it is quite a rare surname, Latvia, where it is a rare surname, and Cameroon. Measured by absolute frequency, it is commonest in Germany, Cameroon, and Botswana. Also, Келс is the forename as well as the last name.