Cognomen Fornau (Fornau 
) , around the world, is a very rare surname. The family name Fornau is characteristic of Latin America and the Caribbean, particularly Colombia, where it is a very rare surname, Argentina, and Peru, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Latin America and the Caribbean, particularly Colombia, Argentina, and Mexico.
| VARIANT | COUNTRY |
|---|---|
| Fornau | Colombia, Argentina, Mexico, Peru |