_______________________
                                              |                       
                       _______________________|
                      |                       |
                      |                       |_______________________
                      |                                               
 _Robert ST LAWRENCE _|
| (1431 - 1486)       |
|                     |                        _______________________
|                     |                       |                       
|                     |_______________________|
|                                             |
|                                             |_______________________
|                                                                     
|
|--Thomas Howth ST LAWRENCE 
|  (1480 - ....)
|                                              _John BEAUFORT ________+
|                                             | (1371 - 1409)         
|                      _Edmund BEAUFORT ______|
|                     | (1406 - 1455)         |
|                     |                       |_Margaret of HOLAND ___
|                     |                         (1380 - 1439)         
|_Joan BEAUFORT ______|
  (1433 - 1518)       |
                      |                        _Richard of BEAUCHAMP _
                      |                       | (1381 - 1439)         
                      |_Eleanor of BEAUCHAMP _|
                        (1407 - 1466)         |
                                              |_Elizabeth BERKELEY ___
                                                (1386 - 1422)