_Henry X WELF _______________+
                                                   | (1108 - 1139)               
                          _Henry III WELF _________|
                         | (1129 - 1195)           |
                         |                         |_Gertrude of SÜPPLINBURGER _+
                         |                           (1115 - 1143)               
 _Henry V WELF __________|
| (1173 - 1227) m 1193   |
|                        |                          _Henry II PLANTAGENET _______+
|                        |                         | (1132 - 1189) m 1152        
|                        |_Matilda of PLANTAGENET _|
|                          (1155 - 1189)           |
|                                                  |_Eleanor of POITIERS ________+
|                                                    (1122 - 1204) m 1152        
|
|--Irmengard of WELF 
|  (1200 - 1259)
|                                                   _Frederick II HOHENSTAUFEN __+
|                                                  | (1090 - 1147) m 1132        
|                         _Conrad HOHENSTAUFEN ____|
|                        | (1135 - 1195)           |
|                        |                         |_Agnes of SAARBRÜCKEN ______
|                        |                           (.... - 1147) m 1132        
|_Agnes of HOHENSTAUFEN _|
  (1176 - 1204) m 1193   |
                         |                          _Berthold I HENNEBERG _______+
                         |                         | (1108 - 1159)               
                         |_Irmengard of HENNEBERG _|
                                                   |
                                                   |_Bertha PUTHELENDORF ________
                                                     (1117 - 1190)