_Bolko II PIAST _____+
                                              | (1300 - 1356)       
                         _Bolko III PIAST ____|
                        | (1337 - 1382)       |
                        |                     |_Elisabeth of PIAST _+
                        |                                           
 _Bolko IV PIAST _______|
| (1363 - 1437)         |
|                       |                      _____________________
|                       |                     |                     
|                       |_Anna of UNKNOWN ____|
|                                             |
|                                             |_____________________
|                                                                   
|
|--Margareta of PIAST 
|  (1412 - 1453)
|                                              _____________________
|                                             |                     
|                        _____________________|
|                       |                     |
|                       |                     |_____________________
|                       |                                           
|_Margareta of UNKNOWN _|
  (1375 - 1437)         |
                        |                      _____________________
                        |                     |                     
                        |_____________________|
                                              |
                                              |_____________________