_William VIII POITIERS __+
                                                   | (1025 - 1086)           
                            _William IX POITIERS __|
                           | (1071 - 1126)         |
                           |                       |_Hildegarde of BURGUNDY _+
                           |                         (1056 - 1104)           
 _Raymond POITIERS ________|
| (1099 - 1149)            |
|                          |                        _William IV ROUERGUE ____+
|                          |                       | (1040 - 1094)           
|                          |_Philippa of ROUERGUE _|
|                            (1073 - 1118)         |
|                                                  |_Emma of MORTAIN ________
|                                                                            
|
|--Maria of POITIERS 
|  (1145 - 1182)
|                                                   _________________________
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|                          |                                                 
|_Constance of HAUTEVILLE _|
  (1128 - 1163)            |
                           |                        _________________________
                           |                       |                         
                           |_______________________|
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