Cognomen 凯斯 (Kase 
, Case 
, Kays ) , worldwide, is a common family name. The surname 凯斯 is habitual in Estonia, where it is quite a common surname, Martinique, and Jamaica (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in the United States, Indonesia, and Ethiopia. Also, 凯斯 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kase | United Kingdom, Indonesia, Ethiopia, United States, India |
| Kays, Case | United Kingdom, Indonesia, Canada, United States, India |
| 凯斯 | China |
Casse, Cayce, Cees, Cornelio, Cornelis, Cornelius, Kaess, Kais, Kaisi, Kaith, Kasee, Kasse, Kaše, Keays, Kees, Keiss, Keith, Keyes, Korneel, Kornel, Kornelis, Kornelius, Kornelíus, Kornél, Kyes, Käse, Qais, Qays, Касэ, Кейс, Кейт, Кес, Кит, Корнел, Корнелий, Корнелио, Корнелис, Корнелиус, Корнель, Корнилий, Кіт, קורנליס, קיז, קס, سيس, قيس, كورنيليس, كيث, كيز, كيس, かせ, キース, ケイス, ケース, 凯思, 凱思, 基夫, 基思, and 塞斯