Surname Collash (Collash 
) , in the world, is a very rare cognomen. The surname Collash is habitual in Jamaica, where it is quite a rare surname, Peru, where it is a very rare surname, and Canada, where it is an extremely rare surname. Not in comparison with a country's population, this name is the most popular in Jamaica, the United States, and Peru.
| VARIANT | COUNTRY |
|---|---|
| Collash | United Kingdom, Canada, Peru, Jamaica, United States |