_Eckhard I WITTELSBACH __________________+
                                                        | (.... - 1091)                           
                       _Otto IV WITTELSBACH ____________|
                      | (1083 - 1156)                   |
                      |                                 |_Richardis of WEIMAR ____________________+
                      |                                                                           
 _Otto V WITTELSBACH _|
| (1117 - 1183)       |
|                     |                                  _Frederick III of PETTENDORF-LENGENFELD _
|                     |                                 |                                         
|                     |_Heilika of PETTENDORF-LENGFELD _|
|                       (1103 - 1170)                   |
|                                                       |_Heilika of HOHENSTAUFEN ________________+
|                                                                                                 
|
|--Mechthild of WITTELSBACH 
|  (1180 - 1231)
|                                                        _Arnold II LOON _________________________+
|                                                       | (.... - 1146)                           
|                      _Louis I LOON ___________________|
|                     | (1107 - 1171)                   |
|                     |                                 |_________________________________________
|                     |                                                                           
|_Agnes of LOON ______|
  (1150 - 1191)       |
                      |                                  _Folmar V METZ __________________________+
                      |                                 | (.... - 1145)                           
                      |_Agnes of METZ __________________|
                        (.... - 1175)                   |
                                                        |_Matilda of MOHA ________________________+
                                                          (.... - 1157)