| | Gilbert 5th Earl of Hertford & 1st Earl of Gloucester de Clare, Earl of Hertford and Gloucester, Surety of the Magna Carta 1180–1230 | | | | Richard 4th Earl of Hertford de Clare 1153–1218 Amice Countess of Gloucester Fitz Robert 1160–1225 | | | | William , Earl of Gloucester fitz Robert 1116–1183 |
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| | | Sir William Marshal, 1st Earl of Pembroke 1146–1219 Isabel FitzGilbert Marshal 1172–1220 | | | | John Marshall (born FitzGilbert), I, of Rockley, Marshal of the Horses 1105–1165 |
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