______________________
                                                     |                      
                            _Ulrich I WÜRTTEMBERG __|
                           | (1226 - 1264) m 1260    |
                           |                         |______________________
                           |                                                
 _Eberhard I WÜRTTEMBERG _|
| (1264 - 1325) m 1296     |
|                          |                          _Bolesław II PIAST __+
|                          |                         | (1220 - 1278)        
|                          |_Agnes of PIAST _________|
|                            (1243 - 1264) m 1260    |
|                                                    |_Hedwig of ASCANIA ___+
|                                                      (.... - 1259)        
|
|--Adelheid of WÜRTTEMBERG 
|  (1295 - 1342)
|                                                     _Herman V ZÄHRINGEN _+
|                                                    | (.... - 1242)        
|                           _Rudolf I ZÄHRINGEN ____|
|                          | (1230 - 1288) m 1257    |
|                          |                         |_Irmengard of WELF ___+
|                          |                           (1200 - 1259)        
|_Irmengard of ZÄHRINGEN _|
  (1270 - 1320) m 1296     |
                           |                          ______________________
                           |                         |                      
                           |_Kunigunde of EBERSTEIN _|
                             (1230 - 1284) m 1257    |
                                                     |______________________