All around the world, Антониу (António 
, Antoniu 
, Antoniou 
) is a common boy's first name. The given name Антониу is habitual in Portugal, where it is a common male name, Cabo Verde, where it is quite a common masculine name, and Angola. In absolute terms, it is commonest in Portugal, Angola, and Romania. Likewise, Антониу is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| António | Mozambique, Portugal, Cabo Verde, Romania, Angola |
| Antoniu | United Kingdom, Greece, Australia, United States, Romania |
| Antoniou | United Kingdom, Greece, Cyprus, United States, Romania |
| Антониу | Ukraine, Russia |
Andoni, Antal, Anthony, Antin, Antoine, Anton, Antoni, Antonie, Antonij, Antonin, Antonino, Antoninus, Antonio, Antonionus, Antonios, Antonius, Antono, Antony, Antonyu, Antonín, Anttonio, Antun, Antón, Antónios, Antônio, Entoni, Imanol, Tones, Toni, Tonino, Tony, Αντωνίου, Αντόνιο, Αντώνιος, Антал, Антин, Антоан, Антон, Антони, Антоний, Антонин, Антонино, Антонио, Антониос, Антониус, Антоно, Антоні, Антоніа, Антоній, Антоній, Антоні,
Антониу is also a prevalent name for the fictitious and mythical characters: Antonio Alcántara , the Spanish fictional character, Tell me how it happened; Tony Montana , the fictional character from Scarface; Toni Cipriani , the protagonist of the 2005 video game 'Grand Theft Auto: Liberty City Stories, Grand Theft Auto III; Ultimate Iron Man , the Ultimate Marvel version of the fictional superhero Iron Man and Vito Scaletta , the fictional character in the video games series: "Mafia", Mafia III, and in many other works.