_Albert I WELF ____________________+
                                              | (1236 - 1279)                     
                       _Albert II WELF _______|
                      | (1268 - 1318)         |
                      |                       |_Adelheid of ALERAMICI ____________
                      |                         (1242 - 1285)                     
 _Magnus I WELF ______|
| (1304 - 1369)       |
|                     |                        _Henry I MECKLENBURG ______________+
|                     |                       | (.... - 1291)                     
|                     |_Rixa of MECKLENBURG __|
|                       (1275 - 1317)         |
|                                             |_Rikissa Birgersdotter of BJÄLBO _+
|                                               (1237 - 1288)                     
|
|--Matilda of WELF 
|  (.... - 1354)
|                                              _John I ASCANIA ___________________+
|                                             | (1213 - 1266) m 1255              
|                      _Henry I ASCANIA ______|
|                     | (1255 - 1317)         |
|                     |                       |_Jutta of ASCANIA _________________+
|                     |                          m 1255                           
|_Sophia of ASCANIA __|
  (1300 - 1356)       |
                      |                        _Louis I WITTELSBACH ______________+
                      |                       | (1229 - 1293)                     
                      |_Agnes of WITTELSBACH _|
                        (1276 - 1345)         |
                                              |_Matilda of HABSBURG ______________+
                                                (1253 - 1304)