_William IV WELF _______+
                                                  | (1425 - 1503)          
                          _Henry IV WELF _________|
                         | (1463 - 1514)          |
                         |                        |_Elizabeth of STOLBERG _
                         |                          (1438 - 1520)          
 _Henry V WELF __________|
| (1489 - 1568)          |
|                        |                         ________________________
|                        |                        |                        
|                        |_Catherine of GRIFFINS _|
|                          (1465 - 1526)          |
|                                                 |________________________
|                                                                          
|
|--Mary of WELF 
|  (1521 - 1539)
|                                                  ________________________
|                                                 |                        
|                         ________________________|
|                        |                        |
|                        |                        |________________________
|                        |                                                 
|_Maria of WÜRTTEMBERG _|
  (1496 - 1541)          |
                         |                         ________________________
                         |                        |                        
                         |________________________|
                                                  |
                                                  |________________________