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Surname Somma in modern Croatia

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Prevalence
Only a few people with faimily name Giovanni live in Croatia today, in households.
They are located in one Croatian city only, in Zagreb (<5).
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Outside Croatia
Family name Giovanni (including: Giovanny , Giovannie ) is present in 80 countries worldwide. "Giovannie " is used by some 100 people in Indonesia and small number in the United States.
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Characteristic first names
Stefano Somma,
Battista Somma,
Di Somma,
Domenico Somma,
Lucia Somma