Ki vette feleségül Marie de Châtillon (comtesse de Vendôme)-t?

Marie de Châtillon est la fille de Guy II de Châtillon et d'Alix de Dreux.

Elle épousa Renaud, comte de Dammartin, puis Robert de Vieuxpont, seigneur de Courville, et enfin Jean III l’Ecclésiastique († 1217) comte de Vendôme, mais n'eut d'enfant que de la seconde union.

Jean III de Preuilly dit l'Ecclésiastique († 1217) comte de Vendôme (1209-1217), fils de Bouchard IV et d'Agathe.

D'abord entré dans les Ordres, d'où son surnom, il en est relevé pour devenir comte à la mort de son neveu Jean II de Vendôme et pour pouvoir prendre femme. Il épouse Marie de Châtillon, mais le mariage reste sans postérité.

Philippe Auguste ayant confirmé son emprise sur la Normandie, l'Anjou, le Maine, la Touraine et le Poitou, Jean III lui jure fidélité en 1212 à Soissons.

Jean III est également le plus ancien comte de Vendôme pour lequel les monnaies sont conservées.

Renaud de Dammartin (Reginald of Boulogne) (c. 1165 – 1227) was Count of Boulogne from 1190, Count of Dammartin from 1200 to 1214 and Count of Aumale from 1204 to 1214. He was the eldest son of Alberic III of Dammartin and Mathilde of Clermont.

Brought up at the French court, he was a childhood friend of Philip Augustus. At his father's insistence he fought for the Plantagenets. Received back into Philip's favour, he married Marie de Châtillon, daughter of Guy II de Châtillon and Adèle of Dreux, a royal cousin.

In 1191, Dammartin's father, Alberic, kidnapped and had Dammartin marry Ida, Countess of Boulogne. The County of Boulogne thereby became vassal to the French king, rather than the count of Flanders. While this marriage made Dammartin a power, it also made enemies in the Dreux family and that of the count of Guînes, who had been betrothed to Ida.

In 1203, Dammartin and his wife gave a merchant's charter to Boulogne. This was probably made for a financial consideration. Philip made Danmartin Count of Aumale the following year, but Danmartin began to detach himself. Following the acquisition of Normandy in April 1204, King Philip granted Danmartin the county of Mortain and the honour of Warenne which was centred on the fortresses of Mortemer and Bellencombre. Both Mortain and Warenne had been held by William I of Boulogne and it would appear that King Philip recognised the Boulogne claim to them.

In 1211, he refused to appear before Philip in a legal matter, a suit with Philippe de Dreux, bishop of Beauvais. Philip II seized his lands and on 4 May 1212 at Lambeth, Dammartin made an agreement with King John who had also lost possessions to Philip. Dammartin brought other continental nobles, including the Count of Flanders, into a coalition with John against Philip. In return he was given several fiefs in England and an annuity. Each promised not to make a separate peace with France.

With the Emperor Otto IV and Ferdinand of Flanders, he took part in the attack on France in 1214 culminating in the Battle of Bouvines. Commanding the Brabançons, he was on the losing side, but was one of the last to surrender, and refused submission to Philip Augustus. His lands were taken away, and given to Philip Hurepel. Dammartin was kept imprisoned at Péronne for the rest of his life, which ended in suicide. The historian Jim Bradbury has described Dammartin's last years:

Renaud languished in prison, and in pitiful conditions. He was chained to a heavy log, which two men had to lift every time he wanted to go to the toilet. Unaided, he could only move half a pace in his chains. His county was granted to Philip's illegitimate son, Philip Hurepel, who saw to it that Renaud would never regain his lands. All those years later, when Ferrand was released, Renaud's hopes of freedom were again dashed. He realized he was to remain in prison for ever.

His daughter Matilda II was married to Philip Hurepel.