_Ernest I WELF ____________+
                                                  | (1497 - 1545)             
                        _Henry III WELF __________|
                       | (1533 - 1597)            |
                       |                          |_Sophia of MECKLENBURG ____+
                       |                            (1508 - 1541)             
 _Augustus WELF _______|
| (1579 - 1666) m 1623 |
|                      |                           _Francis I ASCANIA ________+
|                      |                          | (1510 - 1580)             
|                      |_Ursula of ASCANIA _______|
|                        (1545 - 1620)            |
|                                                 |_Sibylle of WETTIN ________+
|                                                   (1515 - 1592)             
|
|--Rudolph August WELF 
|  (1627 - 1703)
|                                                  _Joachim Ernest ASCANIA ___+
|                                                 | (1536 - 1586) m 1570      
|                       _Rudolph ASCANIA _________|
|                      | (1576 - 1621)            |
|                      |                          |_Eleonore of WÜRTTEMBERG _+
|                      |                            (1551 - 1617) m 1570      
|_Dorothea of ASCANIA _|
  (1607 - 1634) m 1623 |
                       |                           _Henry Julius WELF ________+
                       |                          | (1564 - 1613)             
                       |_Dorothea Hedwig of WELF _|
                         (1586 - 1609)            |
                                                  |_Dorothea of WETTIN _______+
                                                    (1563 - 1586)