Family name Coolin (Coolin 
) , worldwide, is a very rare cognomen. The surname Coolin is habitual in Canada, where it is a very rare surname, the United Kingdom, and Indonesia. In absolute terms, the name is most common in Indonesia, the United States, and the United Kingdom. Very seldom, Coolin is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Coolin | Canada, United Kingdom, France, Indonesia, United States |