Isabella of Gloucester 1173–1217 John "John Lackland" Plantagenet 1166–1216 | | |
| | William Fitz Robert of Gloucester 1116–1183 | | | | Robert FitzRoy of Gloucester 1090–1147 Mabel FitxHarmon 1100–1157 | | | | Henri "Henri I Beauclerc" de Normandie 1068–1135 | | | | Guillaume "Guillaume I le Conquérant" de Normandie 1028–1087 Mathilde de Flandre 1031–1083 | | | | Robert "Robert I le Diable" de Normandie 1000–1035 Herleva de Falaise 1015–1050 | | |
| | | Baudouin "Baudouin V le Pieux" de Flandre 1012–1067 | | |
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