Surname Riaguas (Riaguas 
) , around the globe, is a very rare family name. The cognomen Riaguas is characteristic of Spain, where it is a very rare surname, France, where it is an extremely rare surname, and Chile. Also, Riaguas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Riaguas | France, Chile, Spain |
| guillermo martÃnez riaguas Roman Catholic bishop (b. 1785) |
|