_Albert I WELF ____________________+
                                             | (1236 - 1279)                     
                       _Albert II WELF ______|
                      | (1268 - 1318)        |
                      |                      |_Adelheid of ALERAMICI ____________
                      |                        (1242 - 1285)                     
 _Ernest I WELF ______|
| (1305 - 1367)       |
|                     |                       _Henry I MECKLENBURG ______________+
|                     |                      | (.... - 1291)                     
|                     |_Rixa of MECKLENBURG _|
|                       (1275 - 1317)        |
|                                            |_Rikissa Birgersdotter of BJÄLBO _+
|                                              (1237 - 1288)                     
|
|--Otto I WELF 
|  (1330 - 1394)
|                                             _Otto I HESSE _____________________+
|                                            | (1272 - 1327) m 1297              
|                      _Henry II HESSE ______|
|                     | (1299 - 1376) m 1322 |
|                     |                      |_Adelheid of CALVELAGE-RAVENSBERG _
|                     |                         m 1297                           
|_Elisabeth of HESSE _|
  (1329 - 1366)       |
                      |                       _Frederick I WETTIN _______________+
                      |                      | (1257 - 1323)                     
                      |_Elisabeth of WETTIN _|
                        (1306 - 1368) m 1322 |
                                             |_Elizabeth of LOBDEBURG-ARNSHAUGK _
                                               (1286 - 1359)