_Geoffrey III CHÂTEAUDUN _+
                                                     | (.... - 1145)             
                        _Hugues V CHÂTEAUDUN _______|
                       | (.... - 1180)               |
                       |                             |_Helvise of MONDOUBLEAU ___
                       |                                                         
 _Hugh VI CHÂTEAUDUN _|
| (.... - 1191)        |
|                      |                              ___________________________
|                      |                             |                           
|                      |_Marguerite of SAINT-CALAIS _|
|                                                    |
|                                                    |___________________________
|                                                                                
|
|--Geoffrey V CHÂTEAUDUN 
|  (.... - 1218)
|                                                     ___________________________
|                                                    |                           
|                       _____________________________|
|                      |                             |
|                      |                             |___________________________
|                      |                                                         
|_Jeanne of PREUILLY __|
                       |
                       |                              ___________________________
                       |                             |                           
                       |_____________________________|
                                                     |
                                                     |___________________________