_______________________________
                                                          |                               
                              _Henry THRELKELD ___________|
                             | (1399 - 1452)              |
                             |                            |_______________________________
                             |                                                            
 _Lancelot Edward THRELKELD _|
| (1435 - 1493)              |
|                            |                             _______________________________
|                            |                            |                               
|                            |_Margaret Alice THORNBURGH _|
|                              (1402 - 1493)              |
|                                                         |_______________________________
|                                                                                         
|
|--Isabel THRELKELD 
|  (1510 - 1532)
|                                                          _Richard RATCLIFFE ____________+
|                                                         | (1401 - 1485)                 
|                             _John DERATCLIFFE __________|
|                            | (1426 - 1485)              |
|                            |                            |_Elizabeth Catherine MOLYNEUX _+
|                            |                              (1395 - 1430)                 
|_Elizabeth RATCLIFFE _______|
  (1462 - 1520)              |
                             |                             _______________________________
                             |                            |                               
                             |_Ann FENWICK _______________|
                               (1430 - 1513)              |
                                                          |_______________________________