_Henry Percy _____________+
                                               | (1341 - 1408) m 1358     
                       _Henry 'Hotspur' Percy _|
                      | (1364 - 1403) m 1379   |
                      |                        |_Margaret de Neville _____+
                      |                          (.... - 1372) m 1358     
 _Henry Percy ________|
| (1392 - 1455) m 1414|
|                     |                         _Edmund Mortimer _________+
|                     |                        | (1351 - 1381) m 1359     
|                     |_Elizabeth Mortimer ____|
|                       (1371 - ....) m 1379   |
|                                              |_Philippa Plantagenet ____+
|                                                (1355 - 1382) m 1359     
|
|--Henry Percy 
|  (1421 - 1461)
|                                               _John de Neville _________+
|                                              | (.... - 1388) m 1364     
|                      _Ralph de Neville ______|
|                     | (1363 - 1425) m 1396   |
|                     |                        |_Maud de Percy ___________+
|                     |                          (.... - 1378) m 1364     
|_Eleanor Neville ____|
  (.... - 1472) m 1414|
                      |                         _John Plantagenet ________+
                      |                        | (1340 - 1399) m 1396     
                      |_Joan de Beaufort ______|
                        (1379 - 1440) m 1396   |
                                               |_Catherine Swynford Roet _+
                                                 (1350 - 1430) m 1396