Surname Giambastiani (Giambastiani 
) , in all the world, is a rare cognomen. The family name Giambastiani is habitual in Italy, where it is a rare surname, Argentina, and Croatia. Measured by absolute frequency, it is the most numerous in Italy, Argentina, and Brazil. Very seldom, Giambastiani is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Giambastiani | Brazil, Italy, Argentina, United States, Croatia |
| angiolo giambastiani Italian politician, IT (b. 1830) |
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| salvador giambastiani CL (b. 1885) |
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edmund giambastiani United States Navy admiral, US (b. 1948) |
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| kurt r. a. giambastiani American writer, US (b. 1958) |
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| giuliano giambastiani researcher |
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| laura giambastiani Italian archivist, IT |
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Mr, Raul, Rita, Gaia, Lara, Leia, Leah, Lisa, Luca, Luis, Luiz, Jose, John, Joao, Juan, Tina, Nora, Elsa, Eldi, Erli, Erci, Enio, Phil, Kyle, Kurt, Kaua, Ms, Al, Ana, Ann, Ray, Ron, Lia, Tom, Edy, Eni, Egle, Eva, Mark, Mila, Sara, Shay, Albi, Adam, Adao, Asha, Aida, Cori, Ugo, and Irma