_William I WEIMAR ___
                                                        | (.... - 0963)       
                         _William II WEIMAR ____________|
                        | (0930 - 1003)                 |
                        |                               |_____________________
                        |                                                     
 _William III WEIMAR ___|
| (.... - 1039)         |
|                       |                                _____________________
|                       |                               |                     
|                       |_______________________________|
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|                                                                             
|
|--Poppo WEIMAR 
|  (.... - 1046)
|                                                        _____________________
|                                                       |                     
|                        _Thietmar IV of SAXON-OSTMARK _|
|                       |                               |
|                       |                               |_____________________
|                       |                                                     
|_Oda of SAXON-OSTMARK _|
                        |
                        |                                _____________________
                        |                               |                     
                        |_______________________________|
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                                                        |_____________________