History of Giannetta last name

Where does Giannetta last name come from?
There are 4 ancestors with Giannetta last name.

Municipality	Events	Period
San Bartolomeo in Galdo, BN	1	1915

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Who contributed for Giannetta last name?
checco: 4 contributions
iItEmanuele: 2 contributions
CalogeroM: 2 contributions