Last name Grotto (Grotto 
, Grotta , Grupta 
) , all around the world, is quite a rare surname. The last name Grotto is characteristic of Italy, where it is quite a rare surname, Panama, where it is a rare surname, and Brazil. Not in comparison with a country's population, it is the most numerous in Italy, Brazil, and India. Much less frequently, Grotto is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Grotta, Grotto | Brazil, Italy, France, United States, Argentina |
| Grupta | United States, India |
| claudio grotto Italian entrepreneur, IT (b. 1948) |
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| franco grotto Italian politician, IT (b. 1949) |
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| ezequiel cristiano grotto Brazilian association football player, BR (b. 1973) |
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| jason grotto journalist, US |
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| denise grotto researcher |
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| rejane maria tommasini grotto researcher (ORCID 0000-0002-4035-9486) |
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| giulia grotto researcher (ORCID 0000-0003-0562-2717) |
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| roberto grotto |
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| francesco grotto Italian mathematician (1993-), IT (b. 1993) |
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| francesco grotto Italian latinist (1997-), IT (b. 1997) |
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