Cognomen クーパー (Cooper 
, Kuper 
, Kooper 
) , in all the world, is a widespread family name. The surname クーパー is habitual in Bahamas, where it is a common surname, Isle of Man, and Liberia (explore the name in all countries). In absolute terms, it is the most numerous in the United States, the United Kingdom, and Australia. Very seldom, クーパー is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Cooper | Australia, Canada, United Kingdom, United States, Liberia |
| Kuper | Australia, Canada, New Zealand, United Kingdom, United States |
| Kooper | Australia, South Africa, Canada, United Kingdom, United States |
| クーパー | Japan |