Last name Rui Antonio (Rui Antonio 
) , in the world, is a rare family name. The surname Rui Antonio is characteristic of Sub-Saharan Africa, particularly Guinea-Bissau, where it is quite a rare surname. Also, Rui Antonio is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Rui Antonio | Guinea-Bissau, Spain, Portugal, Brazil |