Cognomen Costanzo (Costanzo 
, Костанцо 
) , globally, is a common surname. The surname Costanzo is characteristic of Marshall Islands, where it is a common surname, Italy, where it is quite a common surname, and Argentina, where it is quite a rare surname. Not in comparison with a country's population, it is commonest in Italy, the United States, and Argentina. Much less frequently, Costanzo is the forename as well as the last name.
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| Costanzo | Australia, France, Argentina, Italy, United States |
| Костанцо | Ukraine |
Constancio, Constant, Costanzó, Констан, Констант, Константа, Констанций, Цостанзо, and קונסטנט
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costanzo di perugia bishop and saint, IT (b. 150) |
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costanzo gallo Junior Roman emperor from 351 to 354, IT (b. 325) |
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costanzo di capri Italian priest, IT (b. 601) |
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costanzo di niardo IT (b. 1066) |
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| costanzo fondulo Roman Catholic bishop (b. 1350) |
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costanzo da fabriano IT (b. 1410) |
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costanzo i sforza Italian noble, IT (b. 1447) |
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| antonio costanzo birth/death: 1436-1490 LCAuth[n88632184] VIAF[88711502], IT (b. 1436) |
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costanzo festa Italian composer, IT (b. 1490) |
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| costanzo da ferrara medallist and painter active in Ferrara, Italy, IT (b. 1450) |
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costanzo porta Italian composer, IT (b. 1529) |
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costanzo torri 16th-century Catholic cardinal, IT (b. 1531) |
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costanzo varolio Italian physician, IT (b. 1543) |
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| costanzo ii sforza Italian noble, IT (b. 1510) |
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| costanzo landi born:1521|died:1564-07-25|; Landi, Costanzo 1521-1564 conte; Landi, Costanzo, conte, 1521-1564; Landi, Costanzo; Landi, Lucio Cornelio Costanzo, 1521-1564 (b. 1521) |
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