Surname Gaggiano (Gaggiano 
) , globally, is a rare family name. The last name Gaggiano is habitual in Italy, where it is a rare surname, Australia, and Argentina, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Italy, the United States, and Germany. Very seldom, Gaggiano is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gaggiano | Germany, Italy, Australia, United States, Argentina |
| andrea gaggiano researcher |
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| carla gaggiano researcher |
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| luisa vidal gaggiano Uruguayan writer, UY |
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Ana, Imma, Maria, Mario, Marty, Marco, Sarah, Amada, Chris, Carla, Karen, Katie, Paolo, Pedro, Rocco, Ruben, David, Diana, Giada, Lello, Lidia, Lucia, Elda, Elba, Nina, Niko, Joe, Ebe, Mark, Mike, Sara, Aldo, Anna, Ciro, Paul, Rita, Luigi, Ruth, Gina, Gino, Lisa, Luca, Lynn, John, Jean, Juan, Tina, Nick, Ryan, and James