Last name Barretoo (Barretoo 
) , around the globe, is a very rare surname. The surname Barretoo is characteristic of Latin America and the Caribbean, particularly Colombia, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and Argentina. Measured by absolute frequency, it is the most numerous in Colombia, India, and Venezuela.
| VARIANT | COUNTRY |
|---|---|
| Barretoo | Colombia, Argentina, Venezuela, Brazil, India |