_John I BRIENNE _______+
                                            | (1170 - 1236) m 1224  
                       _Louis of BRIENNE ___|
                      | (1230 - 1297)       |
                      |                     |_Berengaria of IVREA __+
                      |                       (1204 - 1237) m 1224  
 _Henry of BEAUMONT __|
| (1285 - 1339) m 1310|
|                     |                      _Raoul VI of BEAUMONT _+
|                     |                     | (1180 - 1239) m 1227  
|                     |_Agnes of BEAUMONT __|
|                       (1230 - 1301)       |
|                                           |_Agnes of LAVAL _______
|                                             (1212 - ....) m 1227  
|
|--Thomas of BEAUMONT 
|  (1313 - 1369)
|                                            _Alexander COMYN ______+
|                                           | (1218 - 1290)         
|                      _Alexander COMYN ____|
|                     | (.... - 1308)       |
|                     |                     |_Elisabeth of QUINCY __+
|                     |                                             
|_Alice of COMYN _____|
  (1291 - 1349) m 1310|
                      |                      _______________________
                      |                     |                       
                      |_Joan LE LATIMER ____|
                                            |
                                            |_______________________