• Born: Braine, Aisne, Picardy, France
• Married:
• Died: 31 March, after 1144

  Research Notes:

The inheritance of Braine by her descendants suggests that Agnes may have been heiress of Braine. If that is correct, one of her predecessors in Braine may have been named in the following charter: Philippe I King of France received the homage of “nepotem nostrum Theobaldum comitem Trecensem”, and of the latter’s nobles of whom “...Guillelmus de Brena...”, by charter dated Apr 1110. Renaud Archbishop of Reims founded the abbey of Igny en Tardenois and confirmed donations, including the donation of "mansionile de potestate Cheherey" made by "domnus Andreas de Baldimento et uxor ipsius Agnes eorumque filii Guillelmi et Guido", by charter dated 1130. "Aelidis uxor Widonis domini de Brana post mortem viri sui…Guidonis" donated "census…Branæ castri et Branellæ villæ" to the Premonstré abbey, with the consent of "patre eorum Andrea de Baldimento et matre eorum Agnetis…", by charter dated 1144. A charter dated 1145 records the donation made by "dominus Andreas de Baldimento et Agnes uxor eius" to Saint-Yved de Braine, with the consent of "Rainaldus Suessonum comes". "Jacobus dominus de Cachennai", with the consent of "Agnetis uxoris mee", made donations to Basse-Fontaine on the suggestion of "Galteri Brenensium comitis et matris, uxoris eius, domine Agnetis de Baldimento et domine mee A Brenensium comitisse" by charter dated 1146.

The necrology of Joyenval records the death “31 Mar“ of "Andreæ de Baldimento et sororis Agnetis uxoris eius” and their foundation of “abbatiæ de Bassofonte et Moncellis”. ²