Cognomen 凯茨 (Kates 
, Cates , Ketz 
) , worldwide, is a common surname. The last name 凯茨 is characteristic of Bahamas, where it is quite a common surname, the United States, where it is quite a rare surname, and New Zealand. In absolute terms, it is the most numerous in the United States, Canada, and the United Kingdom. Much less frequently, 凯茨 is the forename as well as the last name.