_Christian III OLDENBURG __+
                                                                                       | (1503 - 1558)             
                                            _John II of SCHLESWIG-HOLSTEIN-SONDERBURG _|
                                           | (1545 - 1622)                             |
                                           |                                           |_Dorothea of ASCANIA ______+
                                           |                                             (1511 - 1571)             
 _Frederick SCHLESWIG-HOLSTEIN-SONDERBURG _|
| (1581 - 1658)                            |
|                                          |                                            _Ernest III WELF __________+
|                                          |                                           | (1518 - 1567)             
|                                          |_Elisabeth of WELF ________________________|
|                                            (1549 - 1585)                             |
|                                                                                      |_Margaret of GRIFFIN ______+
|                                                                                        (1518 - 1569)             
|
|--Rudolph Frederick SCHLESWIG-HOLSTEIN-SONDERBURG 
|  (1645 - 1688)
|                                                                                       _Joachim Ernest ASCANIA ___+
|                                                                                      | (1536 - 1586) m 1570      
|                                           _Rudolph ASCANIA __________________________|
|                                          | (1576 - 1621)                             |
|                                          |                                           |_Eleonore of WÜRTTEMBERG _+
|                                          |                                             (1551 - 1617) m 1570      
|_Eleonor of ASCANIA ______________________|
  (1608 - 1681)                            |
                                           |                                            _Henry Julius WELF ________+
                                           |                                           | (1564 - 1613)             
                                           |_Dorothea Hedwig of WELF __________________|
                                             (1586 - 1609)                             |
                                                                                       |_Dorothea of WETTIN _______+
                                                                                         (1563 - 1586)