Cognomen Кайнер (Kiner 
, Kainer 
, Kayner 
) , worldwide, is quite a rare surname. The cognomen Кайнер is characteristic of Austria, where it is quite a rare surname, the United States, where it is a rare surname, and Germany. Very seldom, Кайнер is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kiner | Poland, Argentina, France, United States, Germany |
| Kainer | Argentina, France, United States, Germany, Austria |
| Kayner | Brazil, Peru, United States, Germany, Venezuela |
| Кайнер | Russia, Kazakhstan, Ukraine |