Onio was born in 1883 in Italy, the son of unknown parents.
His wife was Francesca Tesdero. They were married, but the date and place have not been found. Their four known children were Mary F. (1911-?), Eselina (1913-?), Perena (1916-) and Spina (1919-).
| Event | Date | Details | Source | Multimedia | Notes | ||
|---|---|---|---|---|---|---|---|
| Birth | 1883 |
|