_Louis I PIAST ____________+
                                                          | (1321 - 1398) m 1341      
                              _Henry VII PIAST ___________|
                             | (1343 - 1399)              |
                             |                            |_Agnes of PIAST ___________+
                             |                              (1321 - 1362) m 1341      
 _Louis II PIAST ____________|
| (1380 - 1436)              |
|                            |                             ___________________________
|                            |                            |                           
|                            |_Helena of ORLAMÜND _______|
|                              (.... - 1369)              |
|                                                         |___________________________
|                                                                                     
|
|--Hedwig of PIAST 
|  (1433 - 1471)
|                                                          _Frederick V HOHENZOLLERN _+
|                                                         | (1332 - 1397) m 1350      
|                             _Frederick VI HOHENZOLLERN _|
|                            | (1371 - 1440) m 1401       |
|                            |                            |_Elisabeth of WETTIN ______+
|                            |                              (1329 - 1375) m 1350      
|_Elisabeth of HOHENZOLLERN _|
  (1403 - 1449)              |
                             |                             _Frederick WITTELSBACH ____+
                             |                            | (1339 - 1393)             
                             |_Elisabeth of WITTELSBACH __|
                               (1383 - 1441) m 1401       |
                                                          |_Maddalena VISCONTI _______+
                                                            (1366 - 1404)