_des Gernons, Ranulph [-father of-] _________________________
                                                    |                                                             
                       _Ranulph des Gernons ________|
                      |                             |
                      |                             |_____________________________________________________________
                      |                                                                                           
 _Hugh de Keveliock __|
| (.... - 1181)       |
|                     |                              _Robert de Caen _____________________________________________+
|                     |                             | (1090 - 1147)                                               
|                     |_Maud FitzRobert ____________|
|                                                   |
|                                                   |_Mabel Fitzhamon ____________________________________________+
|                                                     (.... - 1157)                                               
|
|--Matilda de Keveliock 
|  (1171 - ....)
|                                                    _de Montford, Simon D'Evreux (Comte D'Evreux) [-father of-] _
|                                                   |                                                             
|                      _Simon D'Evreux de Montford _|
|                     |                             |
|                     |                             |_____________________________________________________________
|                     |                                                                                           
|_Bertrade D'Evreux __|
                      |
                      |                              _Robert de Beaumont _________________________________________+
                      |                             | (.... - 1190)                                               
                      |_Amice de Beaumont __________|
                                                    |
                                                    |_Pernell ____________________________________________________+
                                                      (.... - 1212)