Giovanni was born on 8 MAR 1855 in Fagnano Alto, L'Aquila, Italy, the son of Domenico Mattia Lattanzi and Petronilla Rosalia Coletti.
His wife was Annina Filippi, who he married on 23 JUN 1887 in Goriano Valli. They had no known children.
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| Event | Date | Details | Source | Multimedia | Notes | ||
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| Birth | 8 MAR 1855 |
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