Isabel … Countess of Gloucester …–1217 King of England John … 1167–1216 | | |
| | Isabella de Clare 1226–1264 Robert Bruce VI 1215–1295 | | |
| | Richard de Clare 1222–1262 Margaret (Megotta) … …–1237 | | |
| | Gilbert de Clare 1180–1230 Isabel Marshall 1200–1240 | | |
| | Amice Fitz Robert 1160–1220 Richard de Clare 1153–1217 | | |
| | Llywelyn ap Hywel Felyn … …– | | |
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| | William Fitz Robert … 2nd Earl of Gloucester 1150–1183 | | |
| | Bertrade de Mainwaring …– | | |
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| | Hugh Kevelioc 3rd Earl of Chester …– | | |
| | Ranulph de Meschines 2nd Earl of Chester …– | | |
| | Robert de Mellment … 1st Earl of Gloucester 1100–1147 | | | | | King of England Henry I Beauclerc … 1068–1135 | | | | King of England (1066-1087), Duke of Normandy (1035-1087) William I …The Conqueror 1027–1087 Mathilda … of Flanders 1031–1083 | | | | Robert I … Duke of Normandy (1028-1035) 1000–1035 Arletta (Herleve) … …–1050 | | | | Richard II … Duke of Normandy (996-1027) 963–1027 Judith … of Brittany 974–1018 | | |
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| | | Baldwin V … Count of Flanders 1012–1067 | | | | Baldwin IV … Count of Flanders 987–1035 | | |
| | | King of France (996-1031) Robert II … 972–1031 Rosella (Suzanna) … of Italy …–1003 Bertha … of Burgundy 952–1035 Constance … of Arles (also of Provence) 986–1034 | | |
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