Surname ケーラー (Koehler 
, Köhler , ケーラー) , around the globe, is a widespread cognomen. The surname ケーラー is characteristic of Germany, where it is a common surname, Austria, where it is quite a common surname, and Sweden. Not in comparison with a country's population, it most frequently occurs in Germany, the United States, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Koehler, Köhler | Germany, Austria, United States, France, Brazil |
| Kähler | Germany, Sweden, Austria, United States, Brazil |