Cognomen Demattio (Demattio 
) , around the globe, is a rare family name. The cognomen Demattio is characteristic of Italy, where it is a rare surname, Germany, and the United States, where it is a very rare surname. Much less frequently, Demattio is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Demattio | Germany, Italy, Brazil, United States, China |
| fortunato demattio (b. 1837) |
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| fortunato demattio IT (b. 1837) |
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frederike demattio German writer, IT (b. 1965) |
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| bruno demattio DE (b. 1938) |
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| anselm demattio DE |
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Mr, Lori, Lois, Luca, Jane, Jose, John, Joan, Joey, Jean, Jeff, Todd, Nedo, Eric, Hopi, Maria, Marco, Sandy, Sally, Sarah, Susan, Scott, Lisa, Lena, Gail, Gary, Ms, Sam, Art, Amy, Kay, Roy, Don, Joe, Tom, Mary, Alana, Mark, Mike, Sara, Alex, Anna, Cyro, Biff, Karl, Kiki, Ryan, Dean, Marg, and Amber