_John I MECKLENBURG _______+
                                                | (1211 - 1264) m 1229      
                         _Henry I MECKLENBURG __|
                        | (1230 - 1301) m 1259  |
                        |                       |_Luitgard of HENNEBERG ____+
                        |                         (1210 - 1267) m 1229      
 _Henry II MECKLENBURG _|
| (1266 - 1328) m 1315  |
|                       |                        _Barnim I GRIFFIN _________+
|                       |                       | (1217 - 1278) m 1238      
|                       |_Anastasia of GRIFFIN _|
|                         (1245 - 1316) m 1259  |
|                                               |_Marianne of WELF _________+
|                                                 (.... - 1252) m 1238      
|
|--John I MECKLENBURG 
|  (1326 - 1392)
|                                                _Albert I ASCANIA _________+
|                                               | (1175 - 1260) m 1247      
|                        _Albert II ASCANIA ____|
|                       | (1250 - 1298)         |
|                       |                       |_Helen of WELF ____________+
|                       |                         (1231 - 1273) m 1247      
|_Anna of ASCANIA ______|
  (.... - 1327) m 1315  |
                        |                        _Rudolf I HABSBURG ________+
                        |                       | (1218 - 1291)             
                        |_Agnes of HABSBURG ____|
                          (1257 - 1322)         |
                                                |_Gertrude of HOHENZOLLERN _+
                                                  (1225 - 1280)