Cognomen Cotnam (Cotnam 
) , throughout the world, is a rare surname. The surname Cotnam is characteristic of Canada, where it is a rare surname, New Zealand, and the United States, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Cotnam | New Zealand, Canada, United Kingdom, United States |
| florence lee brown cotnam American suffragist, US (b. 1865) |
|
|
| jacques cotnam CA (b. 1941) |
|