_Siemomysł PIAST _______+
                                                        | (.... - 0950)           
                              _Mieszko I PIAST _________|
                             | (0930 - 0992)            |
                             |                          |_________________________
                             |                                                    
 _Boleslaus I Chrobry PIAST _|
| (0967 - 1025)              |
|                            |                           _Boleslaus I PŘEMYSLID _+
|                            |                          | (0915 - 0967)           
|                            |_Doubravka of PŘEMYSLID _|
|                              (0940 - 0977)            |
|                                                       |_Biagota of UNKNOWN _____
|                                                         (0901 - ....)           
|
|--Otto Bolesławowic PIAST 
|  
|                                                        _________________________
|                                                       |                         
|                             __________________________|
|                            |                          |
|                            |                          |_________________________
|                            |                                                    
|_Emnilda of LUSATIA ________|
  (0970 - 1017)              |
                             |                           _________________________
                             |                          |                         
                             |__________________________|
                                                        |
                                                        |_________________________