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 | Democratic Republic of the Congo, Nicaragua, United States, India, Honduras |
| Келсин | Kazakhstan, Russia, Kyrgyzstan |
| Kelsyn | Nicaragua, United States, Brazil, New Zealand, Honduras |
| Kelsine | United States |