Surname Rivaas (Rivaas 
) , all around the world, is a very rare cognomen. The last name Rivaas is characteristic of Colombia, where it is a very rare surname, Spain, where it is an extremely rare surname, and Mexico. Very seldom, Rivaas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rivaas | South Africa, Spain, Mexico, Colombia, United States |