Family name Giacomazzo (Giacomazzo 
) , all over the world, is quite a rare last name. The cognomen Giacomazzo is habitual in Italy, where it is quite a rare surname, France, where it is a rare surname, and Argentina, where it is a very rare surname. Not in comparison with a country's population, it is commonest in Italy, the United States, and France. Very seldom, Giacomazzo is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Giacomazzo | Italy, United States, Argentina, France, Brazil |
| giacinto romano giacomazzo Italian jurist and lawyer (1928-2011), IT (b. 1928) |
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| bruno giacomazzo researcher ORCID ID = 0000-0002-6947-4023 |
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| gina elena giacomazzo researcher |
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