_William I HOLLAND ______+
                                            | (1167 - 1221) m 1197    
                       _Floris IV HOLLAND __|
                      | (1210 - 1234)       |
                      |                     |_Adelaide of WASSENBERG _
                      |                       (1182 - 1218) m 1197    
 _William II HOLLAND _|
| (1226 - 1255)       |
|                     |                      _________________________
|                     |                     |                         
|                     |_Matilda of REGINAR _|
|                       (1200 - 1267)       |
|                                           |_________________________
|                                                                     
|
|--Floris V HOLLAND 
|  (1254 - 1296)
|                                            _William WELF ___________+
|                                           | (1184 - 1213)           
|                      _Otto I WELF ________|
|                     | (1204 - 1252) m 1228|
|                     |                     |_Helena of ESTRIDSEN ____+
|                     |                       (1180 - 1233)           
|_Elisabeth of WELF __|
  (1230 - 1266)       |
                      |                      _Albert II ASCANIA ______+
                      |                     | (1177 - 1219) m 1205    
                      |_Matilda of ASCANIA _|
                        (1210 - 1261) m 1228|
                                            |_Matilda of WETTIN ______+
                                              (1185 - 1225) m 1205