Plantagenet-de Bretagne, Constance
| Birth Name | Plantagenet-de Bretagne, Constance 1 2 3 |
| Gender | female |
| Age at Death | 40 years, 2 months, 23 days |
| Birth date | 12 June 1161 (St Brieuc, Cotes du Nord, Bretagne, France) |
| Death date | 5 September 1201 (Nantes, Loire-Atlantique, Anjou/Pays de la Loire, France) |