GERTRUDE de Nesle (-[26 Sep 1220/Oct 1222). The Chronicle of Alberic de Trois-Fontaines names "uxorem comitis Iohannis Bellimontis…et uxorem Stephani de Sancerra" as the two daughters of "Alaydis [filia comitem de Brana Robertum domnum]" & her fourth husband, specifying that "Matheus de Montinorenci" had children by the former[4057]. "Matheus dominus Montis Moren[tiaci]" donated property "in grangia mea de Herovilla" to Val-Notre-Dame, with the consent of "Gertrudis uxoris mee et Buccardi primogeniti mei", by charter dated Sep 1222[4058]. This charter is presumably misdated in light of the date of the second marriage of Mathieu [II] de Montmorency. The necrology of the abbey of Notre-Dame du Val records the death "VI Kal Oct" of "Geltrudis domina de Montemorenciaco"[4059]. m firstly (annulled) as his first wife, JEAN de Beaumont, son of MATHIEU [II] Comte de Beaumont & his second wife Adela Dame de Luzarches (-1222). He succeeded his half-brother as Comte de Beaumont in 1209. m secondly (1193) as his first wife, MATHIEU [II] "le Grand" Seigneur de Montmorency, son of BOUCHARD [IV] Seigneur de Montmorency & his wife Laurette de Hainaut (-24 Nov 1230).