_Fulk IV CHÂTEAUDUN _________+
                                                          | (1043 - 1109) m 1089         
                            _Fulk V CHÂTEAUDUN __________|
                           | (1089 - 1143) m 1110         |
                           |                              |_Bertrade of MONTFORT ________+
                           |                                (1070 - 1116) m 1089         
 _Elias II CHÂTEAUDUN ____|
| (1111 - 1149)            |
|                          |                               _Elias I BAUGENCY ____________
|                          |                              | (.... - 1110) m 1090         
|                          |_Ermengarde of BAUGENCY ______|
|                            (1092 - 1125) m 1110         |
|                                                         |_Matilda of CHÂTEAU-DU-LOIR _
|                                                           (1055 - 1109) m 1090         
|
|--Beatrix of CHÂTEAUDUN 
|  
|                                                          _Geoffroy II CHÂTEAUDUN _____+
|                                                         | (.... - 1100)                
|                           _Routrou III CHÂTEAUDUN _____|
|                          | (1080 - 1144)                |
|                          |                              |_Beatrix of RAMERUPT _________
|                          |                                                             
|_Philippa of CHÂTEAUDUN _|
  (1103 - ....)            |
                           |                               _Henry I NORMANDY ____________+
                           |                              | (1068 - 1135)                
                           |_Matilda FitzRoy of NORMANDY _|
                             (1090 - 1120)                |
                                                          |_Edith of UNKNOWN ____________