_Ernest I WELF ___________+
                                               | (1497 - 1545)            
                       _Henry III WELF ________|
                      | (1533 - 1597)          |
                      |                        |_Sophia of MECKLENBURG ___+
                      |                          (1508 - 1541)            
 _Julius Ernest WELF _|
| (1571 - 1636)       |
|                     |                         _Francis I ASCANIA _______+
|                     |                        | (1510 - 1580)            
|                     |_Ursula of ASCANIA _____|
|                       (1545 - 1620)          |
|                                              |_Sibylle of WETTIN _______+
|                                                (1515 - 1592)            
|
|--August WELF 
|  (1619 - ....)
|                                               _Ernest I WELF ___________+
|                                              | (1497 - 1545)            
|                      _William VI WELF _______|
|                     | (1535 - 1592) m 1561   |
|                     |                        |_Sophia of MECKLENBURG ___+
|                     |                          (1508 - 1541)            
|_Sybille of WELF ____|
  (1584 - 1652)       |
                      |                         _Christian III OLDENBURG _+
                      |                        | (1503 - 1558)            
                      |_Dorothea of OLDENBURG _|
                        (1546 - 1616) m 1561   |
                                               |_Dorothea of ASCANIA _____+
                                                 (1511 - 1571)