Cognomen コチャ (コチャ 
, Koča 
) , across the world, is a very rare surname. The surname コチャ is habitual in Eastern Europe, particularly Czechia, where it is a rare surname. Likewise, コチャ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| コチャ | Japan |
| Koča | Croatia, Czechia |