Engelbert was born circa 980 in Brienne-le-Château to Engelbert II de Brienne and died circa 1035 of unspecified causes. He married Mainfreda de Sens (999-1059) .
Children
| Name | Birth | Death | Joined with |
| Marie de Brienne (1024-1062) | 1024 Brienne-le-Château | 1062 | Étienne I de Joinville et les Vaux (1010-?) |
| Englebert IV de Brienne (1025-1056) | 1025 Brienne-le-Château | 1056 | Pétronille de Joigny (1020-c1067) |
Siblings
| Name | Birth | Death | Joined with |
| Englebert III de Brienne (980-1035) | 980 Brienne-le-Château | 1035 | Mainfreda de Sens (999-1059) |