_Frederick I HOHENZOLLERN _+
                                                       | (1139 - 1200)             
                               _Conrad I HOHENZOLLERN _|
                              | (1186 - 1261)          |
                              |                        |_Sophie of RAABS __________
                              |                                                    
 _Frederick III HOHENZOLLERN _|
| (1220 - 1297)               |
|                             |                         ___________________________
|                             |                        |                           
|                             |________________________|
|                                                      |
|                                                      |___________________________
|                                                                                  
|
|--Frederick IV HOHENZOLLERN 
|  (1287 - 1332)
|                                                       _Bernard III ASCANIA ______+
|                                                      | (1134 - 1211) m 1173      
|                              _Albert I ASCANIA ______|
|                             | (1175 - 1260) m 1247   |
|                             |                        |_Judith of PIAST __________+
|                             |                          (1154 - 1201) m 1173      
|_Helen of ASCANIA ___________|
  (1247 - 1309)               |
                              |                         _Otto I WELF ______________+
                              |                        | (1204 - 1252) m 1228      
                              |_Helen of WELF _________|
                                (1231 - 1273) m 1247   |
                                                       |_Matilda of ASCANIA _______+
                                                         (1210 - 1261) m 1228