Family name Rios Aquino (Rios Aquino 
) , all over the world, is a rare cognomen. The last name Rios Aquino is habitual in Latin America and the Caribbean, particularly Paraguay, where it is quite a rare surname, Ecuador, where it is a very rare surname, and Chile, where it is an extremely rare surname. Measured by absolute frequency, this name is the most popular in Latin America and the Caribbean, particularly Paraguay, Ecuador, and Argentina.
| VARIANT | COUNTRY |
|---|---|
| Rios Aquino | Paraguay, Argentina, Chile, Ecuador |