Cognomen Mastromonaco (Mastromonaco 
) , across the world, is a rare last name. The surname Mastromonaco is habitual in Cayman Islands, where it is quite a rare surname, Italy, where it is a rare surname, and Canada. Not in comparison with a country's population, it is the most numerous in Italy, the United States, and Argentina.
| VARIANT | COUNTRY |
|---|---|
| Mastromonaco | Canada, Argentina, Sweden, Italy, United States |
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alyssa mastromonaco American business executive and former White House Deputy Chief of Staff for Operations, US (b. 1976) |
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| pina mastromonaco Peerage person ID=127780 |
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| gabriela f mastromonaco researcher (ORCID 0000-0001-6229-0355) |
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