Last name Кассел (Cassell 
, Kassel 
, Кассел 
) , in all the world, is a common cognomen. The cognomen Кассел is habitual in Dominica, where it is quite a common surname, Antigua and Barbuda, and Liberia. Measured by absolute frequency, it most frequently occurs in the United States, Germany, and the United Kingdom. Much less frequently, Кассел is the forename as well as the last name.