_Boleslaw III PIAST _____+
                                             | (1291 - 1352)           
                        _Louis I PIAST ______|
                       | (1321 - 1398) m 1341|
                       |                     |_Margaret of PŘEMYSLID _+
                       |                       (1295 - 1322)           
 _Henry VII PIAST _____|
| (1343 - 1399)        |
|                      |                      _Henry IV PIAST _________+
|                      |                     | (1292 - 1341)           
|                      |_Agnes of PIAST _____|
|                        (1321 - 1362) m 1341|
|                                            |_Matlida of ASCANIA _____+
|                                              (.... - 1323)           
|
|--Louis II PIAST 
|  (1380 - 1436)
|                                             _________________________
|                                            |                         
|                       _____________________|
|                      |                     |
|                      |                     |_________________________
|                      |                                               
|_Helena of ORLAMÜND _|
  (.... - 1369)        |
                       |                      _________________________
                       |                     |                         
                       |_____________________|
                                             |
                                             |_________________________