_Philip I CAPET _____+
                                               | (1052 - 1108)       
                          _Louis VI CAPET _____|
                         | (1081 - 1137)       |
                         |                     |_Bertha of HOLLAND __+
                         |                       (1055 - 1094)       
 _Robert I DREUX ________|
| (1123 - 1188)          |
|                        |                      _Humbert II SAVOY ___+
|                        |                     | (1065 - 1103)       
|                        |_Adelaide of SAVOY __|
|                          (1092 - 1154)       |
|                                              |_Gisela of IVREA ____+
|                                                (1075 - 1135)       
|
|--Isabelle of DREUX 
|  (1261 - 1300)
|                                               _____________________
|                                              |                     
|                         _____________________|
|                        |                     |
|                        |                     |_____________________
|                        |                                           
|_Isabelle of VILLEBEON _|
  (1240 - 1265)          |
                         |                      _____________________
                         |                     |                     
                         |_____________________|
                                               |
                                               |_____________________