_Casimir II PIAST ___________________+
                                                       | (1138 - 1194)                       
                        _Konrad I PIAST _______________|
                       | (1188 - 1247)                 |
                       |                               |_Helen of PŘEMYSLID ________________+
                       |                                 (1141 - 1202)                       
 _Casimir I PIAST _____|
| (1211 - 1267)        |
|                      |                                _Svyatoslav III Igorevich OLGOVICHI _
|                      |                               | (1176 - 1211)                       
|                      |_Agafia Svyatoslavna of RURIK _|
|                                                      |
|                                                      |_Yaroslava Rurikovna RURIK __________+
|                                                                                            
|
|--Siemowit PIAST 
|  (1262 - 1312)
|                                                       _Mieszko IV PIAST ___________________+
|                                                      | (1130 - 1211)                       
|                       _Casimir I PIAST ______________|
|                      | (1179 - 1230)                 |
|                      |                               |_Ludmila of UNKNOWN _________________
|                      |                                                                     
|_Euphrosyne of PIAST _|
  (1228 - 1292)        |
                       |                                _____________________________________
                       |                               |                                     
                       |_Viola of UNKNOWN _____________|
                                                       |
                                                       |_____________________________________