__
                         |  
                       __|
                      |  |
                      |  |__
                      |     
 _Thomas GROSVENOR ___|
| (1513 - 1549)       |
|                     |   __
|                     |  |  
|                     |__|
|                        |
|                        |__
|                           
|
|--Thomas GROSVENOR 
|  (1529 - 1579)
|                         __
|                        |  
|                      __|
|                     |  |
|                     |  |__
|                     |     
|_Maud POOL __________|
  (1507 - 1582)       |
                      |   __
                      |  |  
                      |__|
                         |
                         |__