_Walter of BURGH ______+
                                              | (1210 - 1271) m 1257  
                       _Richard Óg of BURGH _|
                      | (1240 - 1326)         |
                      |                       |_Aveline FITZJOHN _____
                      |                          m 1257               
 _John of BURGH ______|
| (1286 - 1313) m 1308|
|                     |                        _______________________
|                     |                       |                       
|                     |_Margarite of UNKNOWN _|
|                                             |
|                                             |_______________________
|                                                                     
|
|--William Donn of BURGH 
|  (1312 - 1333)
|                                              _Richard of CLARE _____+
|                                             | (1222 - 1262)         
|                      _Gilbert of CLARE _____|
|                     | (1243 - 1295) m 1290  |
|                     |                       |_Maud of LACY _________+
|                     |                         (1222 - 1288)         
|_Elizabeth of CLARE _|
  (1295 - 1360) m 1308|
                      |                        _Edward I PLANTAGENET _+
                      |                       | (1239 - 1307)         
                      |_Joan of PLANTAGENET __|
                        (1272 - 1307) m 1290  |
                                              |_Eleanor of IVREA _____+
                                                (1239 - 1290)