_Robert II DREUX ________+
                                                      | (1154 - 1218)           
                            _Robert III DREUX ________|
                           | (1185 - 1234)            |
                           |                          |_Yolanda of COUCY _______
                           |                                                    
 _Robert DREUX ____________|
| (1217 - 1264)            |
|                          |                           _________________________
|                          |                          |                         
|                          |_Alianor of ST VALÉRY ___|
|                                                     |
|                                                     |_________________________
|                                                                               
|
|--Alix of DREUX 
|  (1255 - 1293)
|                                                      _Geoffrey V CHÂTEAUDUN _+
|                                                     | (.... - 1218)           
|                           _Geoffrey VI CHÂTEAUDUN _|
|                          | (.... - 1249)            |
|                          |                          |_Adelicia of NEVERS _____
|                          |                                                    
|_Clemence of CHÂTEAUDUN _|
  (.... - 1259)            |
                           |                           _________________________
                           |                          |                         
                           |_Clemence of ROCHES ______|
                                                      |
                                                      |_________________________