_Frederick II WELF _________+
                                                   | (1418 - 1477) m 1429       
                        _Otto V WELF ______________|
                       | (1439 - 1470) m 1467      |
                       |                           |_Magdalene of HOHENZOLLERN _+
                       |                             (1412 - 1454) m 1429       
 _Henry WELF __________|
| (1468 - 1531)        |
|                      |                            _John IV NASSAU-SIEGEN _____+
|                      |                           | (1410 - 1474)              
|                      |_Anna of NASSAU-SIEGEN ____|
|                        (1441 - 1514) m 1467      |
|                                                  |_Maria of LOON-HEINSBERG ___+
|                                                    (1426 - 1502)              
|
|--Francis WELF 
|  (1508 - 1549)
|                                                   _Frederick II WETTIN _______+
|                                                  | (1412 - 1464)              
|                       _Ernest WETTIN ____________|
|                      | (1440 - 1486)             |
|                      |                           |_Margaret of HABSBURG ______+
|                      |                             (1416 - 1485)              
|_Margarete of WETTIN _|
  (1469 - 1528)        |
                       |                            _Albert III WITTELSBACH ____+
                       |                           | (1401 - 1459)              
                       |_Elisabeth of WITTELSBACH _|
                         (1442 - 1483)             |
                                                   |_Anna of WELF ______________+
                                                     (1414 - 1474)