_Louis of BRIENNE ______+
                                             | (1230 - 1297)          
                        _Henry of BEAUMONT __|
                       | (1285 - 1339) m 1310|
                       |                     |_Agnes of BEAUMONT _____+
                       |                       (1230 - 1301)          
 _John of BEAUMONT ____|
| (1318 - 1342)        |
|                      |                      _Alexander COMYN _______+
|                      |                     | (.... - 1308)          
|                      |_Alice of COMYN _____|
|                        (1291 - 1349) m 1310|
|                                            |_Joan LE LATIMER _______
|                                                                     
|
|--Joan DEBEAUMONT 
|  (1360 - 1400)
|                                             _Edmund PLANTAGENET ____+
|                                            | (1244 - 1296) m 1275   
|                       _Henry PLANTAGENET __|
|                      | (1281 - 1345) m 1296|
|                      |                     |_Blanche of ARTOIS _____+
|                      |                       (1248 - 1302) m 1275   
|_Eleanor PLANTAGENET _|
  (1318 - 1372)        |
                       |                      _Patrick of CHAWORTH ___
                       |                     |                        
                       |_Maud CHAWORTH ______|
                         (1281 - 1322) m 1296|
                                             |_Isabella of BEAUCHAMP _+
                                               (1263 - 1306)