_Dietrich OLDENBURG ____+
                                                     | (1398 - 1439)          
                          _Christian VI OLDENBURG ___|
                         | (1425 - 1481) m 1449      |
                         |                           |_Helvig of SCHAUENBURG _
                         |                             (1398 - 1436)          
 _Frederick I OLDENBURG _|
| (1471 - 1533) m 1518   |
|                        |                            _John II HOHENZOLLERN __+
|                        |                           | (1406 - 1464)          
|                        |_Dorothea of HOHENZOLLERN _|
|                          (1430 - 1495) m 1449      |
|                                                    |_Barbara of ASCANIA ____+
|                                                      (1405 - 1465)          
|
|--John II OLDENBURG 
|  (1521 - 1580)
|                                                     _Eric II GRIFFIN _______+
|                                                    | (1418 - 1474)          
|                         _Bogislaw X GRIFFIN _______|
|                        | (1454 - 1523)             |
|                        |                           |_Sophia of GRIFFIN _____+
|                        |                             (1435 - 1497)          
|_Sophie of GRIFFIN _____|
  (1498 - 1568) m 1518   |
                         |                            _Casimir IV JAGIEŁŁO _+
                         |                           | (1427 - 1492)          
                         |_Anna of JAGIEŁŁO _______|
                           (1475 - 1503)             |
                                                     |_Elizabeth of HABSBURG _+
                                                       (1436 - 1505)