_Simon IV of MONTFORT _______+
                                              | (1148 - 1188)               
                        _Simon V of MONTFORT _|
                       | (1170 - 1218)        |
                       |                      |_Amicia of BEAUMONT _________+
                       |                        (1148 - 1215)               
 _Amaury of MONTFORT __|
| (1192 - 1241)        |
|                      |                       _Bouchard IV of MONTMORENCY _+
|                      |                      | (1135 - 1189)               
|                      |_Alix of MONTMORENCY _|
|                        (1170 - 1220)        |
|                                             |_Lauretta of FLANDERS _______+
|                                               (1150 - 1181)               
|
|--John I of MONTFORT 
|  (.... - 1249)
|                                              _____________________________
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|                       ______________________|
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|                      |                                                    
|_Beatrix of VIENNOIS _|
                       |
                       |                       _____________________________
                       |                      |                             
                       |______________________|
                                              |
                                              |_____________________________