_Louis I PIAST __________+
                                                    | (1321 - 1398) m 1341    
                       _Henry VII PIAST ____________|
                      | (1343 - 1399)               |
                      |                             |_Agnes of PIAST _________+
                      |                               (1321 - 1362) m 1341    
 _Henry IX PIAST _____|
| (1369 - 1420)       |
|                     |                              _________________________
|                     |                             |                         
|                     |_Helena of ORLAMÜND ________|
|                       (.... - 1369)               |
|                                                   |_________________________
|                                                                             
|
|--Louis III PIAST 
|  (1405 - 1441)
|                                                    _Casimir I PIAST ________+
|                                                   | (1280 - 1358)           
|                      _Přemyslav I Nošák PIAST _|
|                     | (1333 - 1410) m 1360        |
|                     |                             |_Euphemia of PIAST ______+
|                     |                               (1312 - 1373)           
|_Anna of PIAST ______|
  (1374 - 1405)       |
                      |                              _Bolesław PIAST ________+
                      |                             | (1330 - 1355)           
                      |_Elisabeth of PIAST _________|
                        (1347 - 1374) m 1360        |
                                                    |_Margareta of STERNBERG _