Cognomen Gaggia (Gaggia 
, Gajeiro 
) , throughout the world, is a rare family name. The family name Gaggia is habitual in Italy, where it is a rare surname, Argentina, and Switzerland. Not in comparison with a country's population, it is the most numerous in Italy, Argentina, and Germany. Much less frequently, Gaggia is the forename as well as the last name.
| pietro gaggia Italian teacher, priest and patriot (1791-1845), IT (b. 1791) |
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giacinto gaggia Roman Catholic Archbishop, IT (b. 1847) |
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achille gaggia Italian entrepreneur and politician, IT (b. 1875) |
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| simonetta sperti gaggia author (1932-) (b. 1932) |
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| francesco gaggia researcher |
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| marco gaggia cyclist, IT (b. 1989) |
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| giancarlo gaggia |
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