Family name Керси (Kersee 
, Kersey 
, Керси) , worldwide, is quite a common cognomen. The family name Керси is habitual in the United States, where it is quite a rare surname, New Zealand, and the United Kingdom. Measured by absolute frequency, it is the most numerous in the United States, the United Kingdom, and Canada. Much less frequently, Керси is the forename as well as the last name.