Family name Ciardo (Ciardo 
) , in the entire world, is quite a rare cognomen. The surname Ciardo is habitual in Italy, where it is quite a rare surname, Switzerland, and Belgium, where it is a rare surname. Not in comparison with a country's population, it is commonest in Italy, the United States, and Switzerland. Much less frequently, Ciardo is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Ciardo | Italy, Switzerland, Belgium, United States, Germany |
| vincenzo ciardo Italian painter (1894-1970), IT (b. 1894) |
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gianni ciardo Italian actor and musician, IT (b. 1949) |
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| francesco ciardo (b. 1890) |
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| manlio ciardo (b. 1907) |
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| roberto ciardo researcher |
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| delia ciardo researcher |
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| francesca ciardo researcher |
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| gianfranco ciardo Ph.D. Duke University 1989 |
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| antonio ciardo researcher (ORCID 0000-0003-2181-3505) |
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| silvana ciardo researcher |
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| barbara ciardo Italian colorist, IT (b. 1983) |
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| diletta ciardo researcher (ORCID 0000-0003-0253-4762) (b. 1991) |
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| luigi ciardo actor, IT (b. 1995) |
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Mr, Rosa, Rita, Ryan, Dana, Dora, Gaia, Gian, Gina, Gigi, Leah, Lina, Lisa, Luca, Lucy, Jose, Joao, Jean, Tony, Tina, Nick, Erin, Pino, Enzo, Paul, Kaye, Ms, Ada, Kim, Don, Dã, Joe, Tom, Teo, Ted, Mary, Matt, Mino, Mike, Sara, Alex, Aldo, Anna, Anne, Amee, Chad, Carl, Kurt, and Vale