Last name Casly (Casly 
) , in the world, is an extremely rare surname. The cognomen Casly is characteristic of Latin America and the Caribbean, particularly Honduras, where it is a very rare surname, and Venezuela, where it is an extremely rare surname. More prevalently, Casly is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Casly | South Africa, India, Venezuela, Malaysia, United States |