Interactive tree of Sir Gilbert Sinclair de Clare

Sir Gilbert Sinclair de Clare 1243–1295

Gilbert 5th Earl of Hertford & 1st Earl of Gloucester de Clare, Earl of Hertford and Gloucester, Surety of the Magna Carta 1180–1230

Isabel Marshal 1200–1240

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

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

Sibilla Evreux 1126–1157