MATHIEU [II] "le Grand" de Montmorency, son of BOUCHARD [IV] Seigneur de Montmorency & his wife Laurette de Hainaut (-24 Nov 1230). The Chronicle of Alberic de Trois-Fontaines names "Matheum in curia Francie nominatissimum et comitissam Montisfortis matrem comitis Almarici" as children of "Loreta [de Haynaco] [uxor] Buchardo de Montinorencei"[654]. "Buccardus de Montemorenciaco" confirmed donations made by "Guibertus de Tauerni…" to l’abbaye du Val, with the consent of "fratres mei Theobaldus et Matheus et Herveus clericus, uxorque mea Laurentia et filius meus Matheus et filia mea Eva", by undated charter[655]. Seigneur de Montmorency, d'Ecouen, de Conflans-Sainte-Honorine et d'Attichy. "Matheus de Montemorenciaco" confirmed various donations to the abbaye du Val, made by "dominus Matheus avus meus" with the consent of "dominus Burchardus pater meus et Theobaldus et Matheus avunculi mei…Lauretæ uxoris suæmatris meæ…sororis meæ Evæ", by charter dated 1193[656]. Connétable de France 1194. "Matheus de Montemorenciaco" donated property to Saint-Martin-des-Champs on the advice of "domni Mathei avunculi mei" by charter dated 1 Jan/9 Apr 1200 or 1 Jan/25 Mar 1201, which also names "Buchardus proavus meus"[657]. "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[658]. The necrology of the abbey of Notre-Dame du Val records the death "VIII Kal Dec" of "dominus Matheus de Montemorenciaco constabularius Francie"[659].
m firstly (1193, [annulled]) GERTRUDE de Soissons, divorced wife of JEAN de Beaumont [later Comte de Beaumont], daughter of RAOUL II Comte de Soissons (-26 Sep [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[660]. "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[661]. 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"[662].
m secondly (Jul 1218) EMMA de Laval Dame de Laval, widow of ROBERT [III] Comte d'Alençon, daughter of GUY [VI] Sire de Laval & his wife Avise de Craon ([1197/98]-27 Apr 1264, bur Abbaye de Clermont). "Guido dominus sextus de Lavalle" donated property to Olivet priory, for the soul of "Ozannæ filiæ meæ", by charter dated to [1205], witnessed by "Haoys uxore mea, Guido filius meus, Emma filia mea"[663]. A manuscript genealogy of the Lords of Beaumont record the marriage of “Robertum comitem Alencheii” and “Emmam filiam Guidonis domini de La Val” after the death of his wife “Joanna…filia domini Josberti de Guirchia”[664]. "Robertus comes d’Alencon et dominus Lavallis et Emma uxor eius filia Guidonis de Lavalle et hæres Lavallis" exchanged property with "Yvoni Franco et dominæ Haoys uxori suæ" by charter dated Feb 1216[665]. "Matheus de Montemorenciaco, conestabularius Franciæ et Emma, eiusuxor, comitissa deAlanconio et domina Lavallensis" ratified a donation by "dominus Ivo Francus et uxor eius Advisia de Lavalle"to Bellebranche, for thesalvation of "domini Guydonis de Lavalle" and for "Hugonis filii sui", by charter dated 1218[666]. "Ama comitissa de Alenceon" donated property to Notre-Dame, Paris for the soul of "domini Mathei de Monte Morenciaco mariti mei defuncti" by charter dated 1230[667]. She married thirdly ([1231]) JEAN Sire de Toucy et de Laval. "Joannes dominus de Toceio miles" confirmed commitments made for his marriage to "Emmam comitissam de Alenchon et dominam de Lavalle" by charter dated 1231[668]. The necrology of Joyenval records the death “27 Apr...circa 1280“ of "dominæ Emmæ comitissæ Alençonio, dominæ de Valle Guyonis, domini Guillelmi de Bellomonte [error] uxoris” and that “domini Guidonis de Laval filii eorum primogeniti” confirmed their donations[669].