Family name Baronio (Baronio 
) , around the world, is quite a rare cognomen. The family name Baronio is habitual in Italy, where it is quite a rare surname, Argentina, where it is a rare surname, and Uruguay. Not in comparison with a country's population, it is the most numerous in Italy, Argentina, and Brazil. Much less frequently, Baronio is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Baronio | Argentina, Brazil, Italy, United States, Colombia |
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cesare baronio Italian cardinal and ecclesiastical historian (1538–1607), IT (b. 1538) |
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| giuseppe baronio (b. 1758) |
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cesare carlo baronio Italian Roman Catholic presbyter, journalist and educator, IT (b. 1887) |
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| ninfa baronio Italian-American anarcha-feminist activist (1874-1969), US (b. 1874) |
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roberto baronio Italian footballer, IT (b. 1977) |
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| luciano baronio Italian Catholic priest (1939-), IT (b. 1939) |
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| gabriele baronio researcher |
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| manuela baronio researcher |
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| domenico baronio composer |
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| cesare m baronio researcher |
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| diego baronio researcher |
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| paolo baronio Italian architect and archaeologist (1984-), IT (b. 1984) |
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| guido baronio |
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| domenico baronio |
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Mr, Dawn, Dino, Gaia, Geni, Gema, Gino, Leci, Lina, Lisa, Luca, Luis, Luiz, Jair, Jose, Joan, Jean, Juan, Tina, Nair, Nora, Elsa, Rubi, Roby, Rosa, Raul, Ms, Ana, Ari, Ary, Cã, Kim, Ray, Eva, Yan, Mary, Elba, Mara, Sara, Alex, Alan, Aldo, Anna, Ampi, Clã, Curt, Pino, Pier, Mike, and Ezio