_William WELF ____________+
                                                 | (1392 - 1482) m 1423     
                         _William IV WELF _______|
                        | (1425 - 1503)          |
                        |                        |_Cecilia of HOHENZOLLERN _+
                        |                          (1405 - 1448) m 1423     
 _Henry IV WELF ________|
| (1463 - 1514)         |
|                       |                         __________________________
|                       |                        |                          
|                       |_Elizabeth of STOLBERG _|
|                         (1438 - 1520)          |
|                                                |__________________________
|                                                                           
|
|--William WELF 
|  (.... - 1557)
|                                                 _Wartislaw IX GRIFFIN ____+
|                                                | (1400 - 1457)            
|                        _Eric II GRIFFIN _______|
|                       | (1418 - 1474)          |
|                       |                        |_Sophia of ASCANIA _______+
|                       |                          (.... - 1462)            
|_Catherine of GRIFFIN _|
  (1465 - 1526)         |
                        |                         _Bogislaw IX GRIFFIN _____+
                        |                        | (1407 - 1446)            
                        |_Sophia of GRIFFIN _____|
                          (1435 - 1497)          |
                                                 |_Maria of PIAST __________+
                                                   (1408 - 1453)