_Rotrou I CHÂTEAUDUN _+
                                                   | (1031 - 1080)         
                             _Hugh IV CHÂTEAUDUN _|
                            |                      |
                            |                      |_Adelise of BELLÊME __
                            |                                              
 _Geoffrey III CHÂTEAUDUN _|
| (.... - 1145)             |
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|                           |                      |                       
|                           |_Agnes of FRÉTEVAL __|
|                                                  |
|                                                  |_______________________
|                                                                          
|
|--Heloise of CHÂTEAUDUN 
|  (.... - 1129)
|                                                   _______________________
|                                                  |                       
|                            ______________________|
|                           |                      |
|                           |                      |_______________________
|                           |                                              
|_Helvise of MONDOUBLEAU ___|
                            |
                            |                       _______________________
                            |                      |                       
                            |______________________|
                                                   |
                                                   |_______________________