Cognomen Керби (Kerby 
, Kerbi 
, Керби 
) , all over the world, is quite a common surname. The surname Керби is habitual in Haiti, where it is quite a rare surname, the United States, and the United Kingdom, where it is a rare surname. Also, Керби is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kerby | Philippines, United Kingdom, United States, Haiti, Democratic Republic of the Congo |
| Kerbi | Philippines, United Kingdom, Canada, United States, Venezuela |
| Керби | Russia, Belarus |