Family name Casnova (Casnova 
) , around the world, is a very rare cognomen. The last name Casnova is habitual in Spain, where it is a very rare surname, Italy, and Thailand, where it is an extremely rare surname. Not in comparison with a country's population, the name is most common in Spain, the United States, and Italy. Very seldom, Casnova is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Casnova | Canada, Spain, Italy, United States, Thailand |