_Bolko I PIAST ______+
                                            | (1258 - 1313)       
                       _Bolko II PIAST _____|
                      | (1300 - 1356)       |
                      |                     |_Agnes of ASCANIA ___+
                      |                                           
 _Bolko III PIAST ____|
| (1337 - 1382)       |
|                     |                      _Bernard PIAST ______+
|                     |                     | (1291 - 1326)       
|                     |_Elisabeth of PIAST _|
|                                           |
|                                           |_Kunigunde of PIAST _+
|                                             (1298 - 1331)       
|
|--Bolko IV PIAST 
|  (1363 - 1437)
|                                            _____________________
|                                           |                     
|                      _____________________|
|                     |                     |
|                     |                     |_____________________
|                     |                                           
|_Anna of UNKNOWN ____|
                      |
                      |                      _____________________
                      |                     |                     
                      |_____________________|
                                            |
                                            |_____________________