Ponthieu, Agnes de ‘Heiress of Montreuil and Panthieu’
| Birth Name | Ponthieu, Agnes de ‘Heiress of Montreuil and Panthieu’ 1 |
| Gender | female |
| Age at Death | 34 years, 9 months, 5 days |
| Birth date | 1066 (Le Mans, Sarthe, Pays de la Loire, France) |
| Death date | 6 October 1100 (Abbéville, Essonne, Ile-de-France, France) |