_Simon IV of MONTFORT _______+
                                                     | (1148 - 1188)               
                         _Simon V of MONTFORT _______|
                        | (1170 - 1218)              |
                        |                            |_Amicia of BEAUMONT _________+
                        |                              (1148 - 1215)               
 _Simon VI of MONTFORT _|
| (1208 - 1265)         |
|                       |                             _Bouchard IV of MONTMORENCY _+
|                       |                            | (1135 - 1189)               
|                       |_Alix of MONTMORENCY _______|
|                         (1170 - 1220)              |
|                                                    |_Lauretta of FLANDERS _______+
|                                                      (1150 - 1181)               
|
|--Guy of MONTFORT 
|  (1244 - 1291)
|                                                     _Henry II PLANTAGENET _______+
|                                                    | (1132 - 1189) m 1152        
|                        _John Lackland PLANTAGENET _|
|                       | (1166 - 1216) m 1200       |
|                       |                            |_Eleanor of POITIERS ________+
|                       |                              (1122 - 1204) m 1152        
|_Eleanor PLANTAGENET __|
  (1215 - 1275)         |
                        |                             _Aymer TAILLEFER ____________+
                        |                            | (1160 - 1202)               
                        |_Isabella TAILLEFER ________|
                          (1186 - 1246) m 1200       |
                                                     |_Alice of COURTENAY _________+
                                                       (1160 - 1217)