_Hugh I CHÂTILLON __________+
                                                 | (1197 - 1248)               
                       _Guy III CHÂTILLON ______|
                      | (.... - 1289) m 1254     |
                      |                          |_Margaret of BLOIS __________+
                      |                            (1170 - 1230)               
 _Guy IV CHÂTILLON __|
| (1254 - 1317)       |
|                     |                           _Henry II REGINAR ___________+
|                     |                          | (1207 - 1247)               
|                     |_Matilda of REGINAR ______|
|                       (1224 - 1288) m 1254     |
|                                                |_Marie of HOHENSTAUFEN ______+
|                                                  (1201 - 1235)               
|
|--Mahaut of CHÂTILLON 
|  (1293 - 1358)
|                                                 _John I of DREUX ____________+
|                                                | (1217 - 1286)               
|                      _John II of DREUX ________|
|                     | (1238 - 1305)            |
|                     |                          |_Blanche of BLOIS-CHAMPAGNE _+
|                     |                            (1226 - 1283)               
|_Marie of DREUX _____|
  (1268 - 1339)       |
                      |                           _Henry III PLANTAGENET ______+
                      |                          | (1207 - 1272) m 1236        
                      |_Beatrice of PLANTAGENET _|
                        (1242 - 1274)            |
                                                 |_Eleanor of BARCELONA _______+
                                                   (1223 - 1291) m 1236