Sergius was the son of unknown parents. The date and place of his birth have not been found.
He died in 0864. The place is not known.
His wife was Drusa. They were married, but the date and place have not been found. Their five known children were Gregory III (?-0870), NN (?-?), Cæsar (?-?), saint Athanasius I (?-0872) and Étienne (?-?).
| Event | Date | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|
| Death | 0864 |
|
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | FROM 0840 | duke of Naples | ||||
| Nobility Title | dux of Cumae |