Family name Cassagnet (Cassagnet 
) , all over the world, is a rare surname. The last name Cassagnet is characteristic of France, where it is a rare surname, Portugal, where it is a very rare surname, and Argentina.
| VARIANT | COUNTRY |
|---|---|
| Cassagnet | Canada, Argentina, Brazil, France, Portugal |
| michel cassagnet de tilladet FR (b. 1646) |
|
|
| gabriel de cassagnet FR (b. 1650) |
|