Silvio was the son of Gioiello Gonnelli and Ada Tovani. The date and place of his birth have not been found.
Silvio Gonnelli
Gioiello Gonnelli (1904-1974)
Eugenio Alfredo Gonnelli (1873-?)
Vincenzo Gonnelli (c1840-?)
Rosa Maffei (c1845-?)
Giuseppa Silvia Armida Paolicchi (1872-?)
Ranieri Paolicchi (c1847-?)
Ersilia Fontana (c1846-?)
Ada Tovani (1907-1984)
Otello Tovani (1882-?)
Salvatore Tovani (c1859-?)
Maria Cappello (c1853-?)
Zaira Festini (1884-?)
Alessandro Festini (c1864-?)
Teresa Guidi (c1864-?)