Hubert de St. Clair (c.1061-c.1105)

William de St. Clair (c.1097-c.1152)
Hamon de St. Clair (c.1099-c.1155), Hereditary Governor of Colchester Castle, Warden of Forest of Essex, Sheriff of Essex (1127)
m. (2) 1130, Margaret FitzWalter (-1150), dau. of Robert FitzWalter of Horsford, Norfolk, Sheriff of Norfolk, and Avelina FitzFlaad
m. (1) Gunnor , dau. of …

Hubert de St. Clair (c.1120-1155)
m. Clementia [de Clare] (1125-1205)

Gunnore de St. Clair (c.1143-)
m. William (I) de Lanvalei (c.1140-1180)

William (II) de Lanvalei (c.1161-18 May 1205)
m. Hawise de Boclonde, dau. of Hugh de Boclonde of Buckland, Berks, and Datchworth, Herts. Sheriff of Berkshire

William (III) de Lanvalei (c.1184-19 Oct 1217)
m. Matilda Pecche, dau. of Gilbert Pecche and Alice FitzWalter of Little Dunmow, Essex

Hawise de Lanvalei (after 1212-1249)
m. before 1227, Sir John de Burgh (1210-7 Jan 1274/5), son of Hubert de Burgh, Justiciar of England

John de Burgh of Wakerley, Northants (c.1234/5-before 3 Mar 1279/80)
m. Cecilia Balliol (-1273), dau of John de Balliol of Barnard Castle and Devorguilla of Galloway

Hawise de Burgh (1256-24 Mar 1299)
m. Robert de Greilly of Manchester (c.1254-15 Feb 1282), son of Robert de Greilley

Joan de Greilly (-1311)
m. after 19 Nov 1294, John La Warre of Ewyas Harold, Herefordshire

Devorguilla de Burgh (1255-1284)
m. Robert FitzWalter of Woodham Walter and Little Dunmow, Essex (1247-18 Jan 1326), Baron FitzWalter (1295), son of Walter FitzRobert and Ida Longspee

Christian de Burgh (-1315)
m. William Marshall of Higham, Norfolk (1277-Bannockburn 1314), 1st Baron Marshal (1309), son of John Marshal, kt., and Hawise

Hawise Marshall (-c.1327), Lady Marshal 1316
m. Robert de Morley (-1360), 2nd Lord Morley, son of William Morley, Lord Morley, and Isabel de Mohaut

William de Morley (1319-1379), 3rd Lord Morley, 4th Lord Marshal