Last name Riascos Montaño (Riascos Montaño 
) , globally, is a very rare surname. The cognomen Riascos Montaño is habitual in Latin America and the Caribbean, particularly Colombia, where it is a very rare surname.
| VARIANT | COUNTRY |
|---|---|
| Riascos Montaño | Colombia |
Yamilec, Alejandro, Oscar Ivan, and Claudia Nayibe