She is married to Dirk II van Beveren.
They got married
Child(ren):
ADA de Coucy (-after 1199). "Radulphus de Marla" confirmed the donation to Thenailles abbey made by "patris mei Ingelranni" by charter dated 1166, witnessed by "Agnes uxor mea, Ada filia mea…"[105]. The Chronicon Hanoniense names (in order) "Iolandem…Agnetis…tercia…Ada" as the three daughters of "Radulphus de Cocy" & his wife, specifying that Ada married "in Flandria Theoderico de Beverna…castellano de Dicamuda"[106]. The Chronicon Hanoniense of Baudouin d’Avesnes records that "la tierce fille monsigneur Raoul de Couchi...Ada" married “monsigneur Thierri de Bevre chastelain de Dikemue, qui ot de lui 2 fius et 3 filles. Li ainsnes des fius...Thierris...sires de Bevres et chastelains de Dykemue apries son pere. Li autres...Guillaumes. L’une des filles Thierri signour de Bevre fu mariee a signour de Grinberghes, ki ot de li une fille qui fu hoirs de sa terre. Si l’ot a feme Godefrois li sires de Pierewes. La seconde fille monsigneur Thierri de Bevre fu mariee a...monsigneur Willaume de Hondescote, qui ot de li un fil...Pieres qui apries son pere tint l’yretage de son pere. Encore ot mesires Willaumes de Hondescote pluisours fius et filles. La tierche fille monsigneur Thierri de Bevre fut mariee a monsigneur Gobert de Monchablon qui ot de li un fil et une fille, li fius...Gobers...[qui] tint la terre apries la mort Gobert son pere”[107]. “Theodoricus dominus de Beverna castellanus de Dixmuda et...uxor mea Ada” donated property to “ecclesia Viconiensi” by charter dated 1199[108]. m [as his first wife,] DIRK [II] van Beveren Châtelain de Dixmude, son of --- (-after Apr 1203).
https://fmg.ac/Projects/MedLands/nfralaoncou.htm#ThomasCoucyPinondied1252A