_Guy III CHÂTILLON ______+
                                            | (.... - 1289) m 1254     
                       _Guy IV CHÂTILLON __|
                      | (1254 - 1317)       |
                      |                     |_Matilda of REGINAR ______+
                      |                       (1224 - 1288) m 1254     
 _John CHÂTILLON ____|
| (.... - 1344) m 1319|
|                     |                      _John II of DREUX ________+
|                     |                     | (1238 - 1305)            
|                     |_Marie of DREUX _____|
|                       (1268 - 1339)       |
|                                           |_Beatrice of PLANTAGENET _+
|                                             (1242 - 1274)            
|
|--Mahaut of CHÂTILLON 
|  (1335 - 1378)
|                                            __________________________
|                                           |                          
|                      _____________________|
|                     |                     |
|                     |                     |__________________________
|                     |                                                
|_Joanna of FIENNES __|
   m 1319             |
                      |                      __________________________
                      |                     |                          
                      |_____________________|
                                            |
                                            |__________________________