_Hugh IV CHÂTEAUDUN _+
                                                          |                      
                               _Geoffrey III CHÂTEAUDUN _|
                              | (.... - 1145)             |
                              |                           |_Agnes of FRÉTEVAL __
                              |                                                  
 _Hugues V CHÂTEAUDUN _______|
| (.... - 1180)               |
|                             |                            ______________________
|                             |                           |                      
|                             |_Helvise of MONDOUBLEAU ___|
|                                                         |
|                                                         |______________________
|                                                                                
|
|--Hugh VI CHÂTEAUDUN 
|  (.... - 1191)
|                                                          ______________________
|                                                         |                      
|                              ___________________________|
|                             |                           |
|                             |                           |______________________
|                             |                                                  
|_Marguerite of SAINT-CALAIS _|
                              |
                              |                            ______________________
                              |                           |                      
                              |___________________________|
                                                          |
                                                          |______________________