Last name Hounau (Hounau 
) , throughout the world, is a very rare cognomen. The cognomen Hounau is habitual in Argentina, where it is a rare surname, France, where it is a very rare surname, and Brazil, where it is an extremely rare surname. Much less frequently, Hounau is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Hounau | Brazil, France, Argentina |