Family name Sponza (Sponza 
) , around the globe, is quite a rare cognomen. The family name Sponza is habitual in Croatia, where it is quite a rare surname, Italy, and Australia, where it is a rare surname. Measured by absolute frequency, it is commonest in Italy, Croatia, and Peru. Much less frequently, Sponza is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Sponza | Australia, Italy, Peru, Croatia, United States |
| roberto sponza Olympic yacht racer, IT (b. 1951) |
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| giovanni sponza Croatian politician, HR (b. 1963) |
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| lorenzo sponza researcher (ORCID 0000-0003-4094-5570) |
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| delia teresa sponza researcher |
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| sandro sponza author (-2002) |
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Ma, Emma, Irma, Ivan, Olga, Maria, Mario, Marco, Sanja, Simon, Sonny, Aligi, Allan, Angel, Anita, Ariel, Carlo, Bruno, Bryan, Paola, Paolo, Peggy, Enzo, Eric, Eddi, Elsa, Ms, Ana, Kim, Leo, Jen, Eli, Mike, Sara, Alex, Aldo, Renzo, Anna, Rosa, Rita, Dino, Luis, Luiz, Jose, John, Joao, June, Nino, Amie, and Delia