_Francis I ASCANIA ______+
                                                      | (1510 - 1580)           
                           _Francis II ASCANIA _______|
                          | (1547 - 1619) m 1582      |
                          |                           |_Sibylle of WETTIN ______+
                          |                             (1515 - 1592)           
 _Francis Julius ASCANIA _|
| (1584 - 1634)           |
|                         |                            _Julius WELF ____________+
|                         |                           | (1528 - 1589)           
|                         |_Maria of WELF ____________|
|                            m 1582                   |
|                                                     |_Hedwig of HOHENZOLLERN _+
|                                                       (1539 - 1602)           
|
|--Maria Sibylla of ASCANIA 
|  (1622 - 1623)
|                                                      _George I WÜRTTEMBERG __+
|                                                     | (1497 - 1558) m 1555    
|                          _Frederick I WÜRTTEMBERG _|
|                         | (1557 - 1607)             |
|                         |                           |_Barbara of HESSE _______+
|                         |                             (1536 - 1597) m 1555    
|_Agnes of WÜRTTEMBERG __|
  (1592 - 1629)           |
                          |                            _Joachim Ernest ASCANIA _+
                          |                           | (1536 - 1586) m 1559    
                          |_Sibylla of ASCANIA _______|
                            (1564 - 1614)             |
                                                      |_Agnes of BARBY _________
                                                        (1540 - 1569) m 1559