_Mieszko I PIAST _________+
                                                         | (0930 - 0992)            
                             _Boleslaus I Chrobry PIAST _|
                            | (0967 - 1025)              |
                            |                            |_Doubravka of PŘEMYSLID _+
                            |                              (0940 - 0977)            
 _Mieszko II Lambert PIAST _|
| (0990 - 1034)             |
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|                           |                            |                          
|                           |_Emnilda of LUSATIA ________|
|                             (0970 - 1017)              |
|                                                        |__________________________
|                                                                                   
|
|--Gertrude of PIAST 
|  (1025 - 1107)
|                                                         __________________________
|                                                        |                          
|                            ____________________________|
|                           |                            |
|                           |                            |__________________________
|                           |                                                       
|_Richeza of EZZON _________|
  (0995 - 1062)             |
                            |                             __________________________
                            |                            |                          
                            |____________________________|
                                                         |
                                                         |__________________________