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Father: Louis DEBRIENNE #47004
Mother: Agnes of BEAUMONT #47005
 
                                               _Érard II of BRIENNE __+
                                              | (.... - 1190)          
                       _John I BRIENNE _______|
                      | (1170 - 1236) m 1224  |
                      |                       |_Agnes of MONTFAUCON ___+
                      |                                                
 _Louis DEBRIENNE ____|
| (1230 - 1297)       |
|                     |                        _Alfonso IX IVREA ______+
|                     |                       | (1171 - 1230)          
|                     |_Berengaria of IVREA __|
|                       (1204 - 1237) m 1224  |
|                                             |_Berengaria of IVREA ___+
|                                               (1179 - 1246)          
|
|--Henry of BEAUMONT 
|  (1285 - 1339)
|                                              _Richard I of BEAUMONT _
|                                             |                        
|                      _Raoul VI of BEAUMONT _|
|                     | (1180 - 1239) m 1227  |
|                     |                       |_Luce of LAIGLE ________+
|                     |                                                
|_Agnes of BEAUMONT __|
  (1230 - 1301)       |
                      |                        ________________________
                      |                       |                        
                      |_Agnes of NORMANDIE ___|
                        (1212 - ....) m 1227  |
                                              |________________________