_Henry WÜRTTEMBERG _______+
                                                      | (1448 - 1519) m 1488      
                             _George I WÜRTTEMBERG __|
                            | (1497 - 1558) m 1555    |
                            |                         |_Eva of SALM-BADENWEILER __
                            |                           (1468 - 1521) m 1488      
 _Frederick I WÜRTTEMBERG _|
| (1557 - 1607)             |
|                           |                          _Philip I HESSE ___________+
|                           |                         | (1504 - 1567) m 1523      
|                           |_Barbara of HESSE _______|
|                             (1536 - 1597) m 1555    |
|                                                     |_Christine of WETTIN ______+
|                                                       (1505 - 1549) m 1523      
|
|--John Frederick WÜRTTEMBERG 
|  (1582 - 1628)
|                                                      _John V ASCANIA ___________+
|                                                     | (1504 - 1550)             
|                            _Joachim Ernest ASCANIA _|
|                           | (1536 - 1586) m 1559    |
|                           |                         |_Margaret of HOHENZOLLERN _+
|                           |                           (1511 - 1577)             
|_Sibylla of ASCANIA _______|
  (1564 - 1614)             |
                            |                          ___________________________
                            |                         |                           
                            |_Agnes of BARBY _________|
                              (1540 - 1569) m 1559    |
                                                      |___________________________