_Gerhard METZ _____________+
                                               | (1030 - 1070)             
                        _Theoderic II METZ ____|
                       | (1055 - 1115) m 1075  |
                       |                       |_Hedwige of NAMUR _________+
                       |                                                   
 _Simon I METZ ________|
| (1076 - 1138)        |
|                      |                        _Frederick FORMBACH _______+
|                      |                       |                           
|                      |_Hedwig of FORMBACH ___|
|                        (1058 - 1090) m 1075  |
|                                              |_Gertrude of HALDENSLEBEN _
|                                                                          
|
|--Robert METZ 
|  
|                                               _Henry II REGINAR _________+
|                                              | (1020 - 1078)             
|                       _Henry III REGINAR ____|
|                      | (.... - 1095) m 1090  |
|                      |                       |_Adela of THUNRINGIA ______
|                      |                                                   
|_Adelaide of REGINAR _|
  (.... - 1158)        |
                       |                        _Robert I FLANDERS ________+
                       |                       | (1035 - 1093)             
                       |_Gertrude of FLANDERS _|
                         (1070 - 1117) m 1090  |
                                               |_Gertrude of BILLUNG ______+
                                                 (1030 - 1113)