Caius was the son of Caius II Octavius but his mother is unknown. The date and place of his birth have not been found.
His wife was Ancaria. They were married, but the date and place have not been found. Their only known child was Caius IV Octavius (c0100BC-0059BC).
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | municipal magistrate |