Cognomen Aquinoo (Aquinoo 
) , in the entire world, is a very rare family name. The cognomen Aquinoo is habitual in Latin America and the Caribbean, particularly the Dominican Republic, where it is a rare surname, Mexico, where it is an extremely rare surname, and Argentina. Measured by absolute frequency, it is the most numerous in Latin America and the Caribbean, particularly the Dominican Republic, Mexico, and Brazil.
| VARIANT | COUNTRY |
|---|---|
| Aquinoo | Brazil, Argentina, Mexico, Dominican Republic |