Around the world, Biagio (Biagio 
, Blasius 
, Бьяджо 
) is a common boy's first name. The first name Biagio is habitual in San Marino, where it is a common masculine name, Italy, where it is quite a common masculine name, and Namibia, where it is quite a rare masculine name. In absolute terms, the name is most common in Italy, Indonesia, and Germany. Very seldom, Biagio is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Biagio | Brazil, Italy, United States, India, Germany |
| Blasius | Brazil, Italy, United States, Indonesia, Germany |
| Бьяджо | Ukraine |
| biagio, archbishop of torres Roman Catholic archbishop (b. 1101) |
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| biagio di goro ghezzi Italian painter in Siena (b. 1325) |
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| biagio pelacani Italian philosopher, mathematician and astrologer, IT (b. 1355) |
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| biagio molin Roman Catholic patriarch, IT (b. 1380) |
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| biagio assereto Italian admiral, IT (b. 1383) |
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biagio rossetti Italian architect, IT (b. 1447) |
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biagio pupini Italian painter, IT (b. 1450) |
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biagio milanesi FR (b. 1444) |
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biagio da cesena Papal Master of Ceremonies, IT (b. 1463) |
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biagio caropipe IT (b. 1462) |
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| baldassarre di biagio Italian Renaissance painter (1430/1434–1484), FR (b. 1430) |
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| biagio berra (b. 1430) |
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| biagio di antonio tucci Italian painter (1446-1516), FR (b. 1446) |
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| biagio balbani (b. 1453) |
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| biagio buonaccorsi FR (b. 1472) |
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Meli, Morelli, Messina, Santoro, Coppola, Palumbo, De Luca, De Rosa, Ferrara, Orlando, Chianese, Catalano, Pugliese, D'Angelo, Garofalo, Grimaldi, Giordano, Liccardo, Lombardo, Esposito, Vallefuoco, Migliaccio, Martino, Vitale, Grasso, Riccio, Marra, Mauro, Amato, Conte, Barra, Bruno, Rizzo, Russo, Gallo, Greco, Sorrentino, Leone, Fusco, Iorio, Oliva, Marino, Alfano, Caruso, Barone, Parisi, Pagano, Romano, Longo, and Carannante