Tondbert was the son of unknown parents. The date and place of his birth have not been found.
His wife was saint Æthelthryth, who he married in ABT 0651. The place has not been found. They had no known children.
| Attribute | Date | Description | Details | Source | Multimedia | Notes |
|---|---|---|---|---|---|---|
| Nobility Title | a prince of the South Gyrwas |