_John of HARCOURT _______+
                                             | (1274 - 1330) m 1300    
                       _William of HARCOURT _|
                      | (1300 - 1349) m 1324 |
                      |                      |_Eleanor of the ZOUCHE __
                      |                        (1278 - ....) m 1300    
 _Thomas of HARCOURT _|
| (1342 - 1417) m 1374|
|                     |                       _________________________
|                     |                      |                         
|                     |_Jane GREY ___________|
|                       (.... - 1369) m 1324 |
|                                            |_________________________
|                                                                      
|
|--Thomas HARCOURT 
|  (1378 - 1420)
|                                             _John of GREY ___________
|                                            |                         
|                      _John GREY ___________|
|                     |                      |
|                     |                      |_Margaret of ODINGSELLS _+
|                     |                                                
|_Maud GREY __________|
  (1347 - 1393) m 1374|
                      |                       _________________________
                      |                      |                         
                      |_Avice MARMION _______|
                                             |
                                             |_________________________