Family name Fontaner (Fontaner 
) , across the world, is a very rare cognomen. The surname Fontaner is habitual in Spain, where it is a very rare surname, Argentina, where it is an extremely rare surname, and Mexico. Not in comparison with a country's population, it is the most numerous in Spain, the United States, and Mexico. Also, Fontaner is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Fontaner | Mexico, United States, Spain, Argentina |