_William of REDVERS __+
                                             | (.... - 1217)        
                       _Baldwin of REDVERS __|
                      | (1200 - 1216)        |
                      |                      |______________________
                      |                                             
 _Baldwin of REDVERS _|
| (1217 - 1244)       |
|                     |                       ______________________
|                     |                      |                      
|                     |_Margaret FITZGEROLD _|
|                                            |
|                                            |______________________
|                                                                   
|
|--Isabella of REDVERS 
|  
|                                             _Richard of CLARE ____+
|                                            | (1153 - 1217)        
|                      _Gilbert of CLARE ____|
|                     | (1180 - 1230)        |
|                     |                      |_Amice of GLOUCESTER _
|                     |                        (.... - 1220)        
|_Amice of CLARE _____|
  (1220 - 1287)       |
                      |                       _William MARSHAL _____
                      |                      | (1146 - 1219)        
                      |_Isabel MARSHAL ______|
                        (1200 - 1239)        |
                                             |_Isabel of CLARE _____+
                                               (1172 - 1185)