Cognomen Келсин (Kelsin 
, Келсин 
, Kelsyn 
) , all over the world, is a rare last name. The last name Келсин is habitual in Honduras, where it is quite a rare surname, Kyrgyzstan, and Nicaragua, where it is a rare surname. Also, Келсин is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kelsin | Nicaragua, Honduras, United States, India, Democratic Republic of the Congo |
| Келсин | Kyrgyzstan, Kazakhstan, Russia |
| Kelsyn | Nicaragua, Honduras, United States, Brazil, New Zealand |
| Kelsine | United States |