In the world, Rui Antonio (Rui Antonio 
) is a very rare boy's first name. The forename Rui Antonio is habitual in Southern Europe, particularly Portugal, where it is a rare male name. Likewise, Rui Antonio is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Rui Antonio | Spain, Brazil, Guinea-Bissau, Portugal |