Cognomen Lamacchia (Lamacchia 
) , in the world, is quite a rare surname. The cognomen Lamacchia is habitual in Italy, where it is quite a rare surname, Switzerland, where it is a rare surname, and Argentina. Measured by absolute frequency, it is the most numerous in Italy, the United States, and Argentina. Much less frequently, Lamacchia is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Lamacchia | Brazil, Italy, Argentina, United States, France |
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bonaventura lamacchia Italian politician and entrepreneur, IT (b. 1953) |
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| al lamacchia baseball player, US (b. 1921) |
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sebastián lamacchia Argentinian association football player, AR (b. 1986) |
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| samuel e. lamacchia (b. 1927) |
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| ada lamacchia (b. 1927) |
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| john c lamacchia researcher |
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| olga lamacchia researcher (ORCID 0000-0002-9175-489X) |
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| zach m lamacchia researcher ORCID ID = 0000-0002-1822-8113 |
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| brian lamacchia Computer security specialist |
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| brian a. lamacchia Ph.D. Massachusetts Institute of Technology 1996 |
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| marc lamacchia Italian baseball player, IT (b. 1982) |
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| raffaele lamacchia |
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