Cognomen Hassley (Hassley 
) , worldwide, is a very rare last name. The family name Hassley is characteristic of Germany, where it is a very rare surname, Mexico, where it is an extremely rare surname, and the United States. Likewise, Hassley is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hassley | Germany, South Africa, Mexico, United States, Venezuela |
| heinrich wilhelm hassley military officer, NL (b. 1795) |
|