_Roger of CLARE _______+
                                             | (1116 - 1173)         
                       _Richard of CLARE ____|
                      | (1153 - 1217)        |
                      |                      |_Matilda de ST HILARY _
                      |                                              
 _Gilbert of CLARE ___|
| (1180 - 1230)       |
|                     |                       _______________________
|                     |                      |                       
|                     |_Amice of GLOUCESTER _|
|                       (.... - 1220)        |
|                                            |_______________________
|                                                                    
|
|--Petronilla of CLARE 
|  (1230 - 1320)
|                                             _______________________
|                                            |                       
|                      _William MARSHAL _____|
|                     | (1146 - 1219)        |
|                     |                      |_______________________
|                     |                                              
|_Isabel MARSHAL _____|
  (1200 - 1239)       |
                      |                       _Richard of CLARE _____+
                      |                      | (1130 - 1176) m 1170  
                      |_Isabel of CLARE _____|
                        (1172 - 1185)        |
                                             |_Aoife MACMURROUGH ____
                                               (1145 - 1188) m 1170