Sir Hugh Bigod, Magna Carta Surety, 3rd Earl of Norfolk; b abt 1182 at Thetford, Norfolk, England, d: bef 18 Feb 1224/25, England.
and his wife
Maud Marshal 1207 Countess of Norfolk & Surrey , Pembrokeshire, Wales, daughter of Sir William Marshal and his wife Isabel de Clare, Countess of Pembroke in her own right.
Roger Bigod, 4th Earl of Norfolk;
Hugh Bigod, Chief Justice of England; b abt 1215, d Nov 1266; m:  Joanna Burnet abt 1232,  Joan de Stuteville bef 5 Feb 1243/44, daughter of Sir Nicholas de Stuteville and Devorguilla of Galloway.
Sir Ralph Bigod;
Matilda le Bigod;
William Le Bigod
Marriage to Gilbert de Lacy, and Issue
Marriage 1: (abt 1225) Gilbert de Lacy, of Trim and Ludlow
They had one son, Walter, and two daughters, Margery and Maud. 
Children of Gilbert de Lacy and Isabel Bigod were:
Maud de Lacy b abt 1228, Herefordshire, England, d 11 Apr 1304, Meath, Ireland. She m: Sir Geoffrey de Geneville, Lord Geneville, Justiciar of Ireland, abt 1244, Meath, Ireland, son of Simon de Joinville, Seneschal of Champagne, and Beatrix of Burgundy.
Margaret de Lacy eldest daughter,  Ewyas Lacy, Herefordshire, England, d 1256. She m. Sir John de Verdun, Lord of Westmeath, bef 14 May 1244, son of Theobald le Boteler and Rohese de Verdun.
Marriage to Sir John FitzGeoffrey and Issue
Marriage 2: (abt 1235) Sir John Fitz Geoffrey, Justiciar of Ireland, Lord of Shere, Knight, b abt 1205, Shere, Surrey, England, d 23 Nov 1258, England
Children of John Fitz Geoffrey and Isabel Bigod were:
Isabel Fitz John b abt 1236, Shere, Surrey, England. She m: Sir Robert de Vipont, Lord of Appleby, abt 1259, Essex, England, son of Sir John de Vipont, Lord of Appleby, and Sibyl de Ferrers.
Maud Fitz John b abt 1240, Bernard Castle, Warwickshire, England, d 16 Apr 1301, Grey Friars, Worcestershire, England. Countess of Warwick; She m:  Gerard de Furnival, and  Sir William de Beauchamp, Earl of Warwick, abt 1255, Worcestershire, England, son of Sir William de Beauchamp and Isabel Mauduit.
Aveline Fitz John b abt 1242, Shere, Surrey, England, d abt 20 May 1274. She m: Sir Walter de Burgh, Earl of Ulster, abt 1255, Surrey, England, son of Sir Richard de Burgh, Lord of Connaught, and Egidia/Jill de Lacy.
Joan Fitz John b abt 1248, Shere, Surrey, England, d 4 Apr 1303. She m: Theobald le Boteler abt 1267-1268, Shere, Surrey, England, son of Theobald le Boteler and Margery/Margaret de Burgh.
Adam Fitzjohn is not named in Richardson and should not be added as a child of John Fitz Geoffrey and Isabel Bigod, (unless a reliable source is discovered with evidence to prove otherwise).
↑ Douglas Richardson, Royal Ancestry, 2013, Volume V, page 238
↑Royal Ancestry: A Study in Colonial and Medieval Families, Vol V, page 239
Magna Carta Ancestry 2011 2nd ed. Vol. IV p. 245-248
The Magna Charta Sureties, 1215, The Barons Named in the Magna Charta, 1215, and Some of Their Descendants Who Settled in America During the Early Colonial Years, Fifth Edition, 1999, by Frederick Lewis Weis, Th.D., with Additions and Corrections by Walter Lee Sheppard, Jr., M.S., Genealogical Publishing Company.
The Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, Extant, Extinct, or Dormant, by G. E. Cokayne, 6-Volume edition, reprinted 2000, Sutton Publishing, Ltd.
Burke's American Families with British Ancestry, excerpted from Burke's Genealogical and Heraldic History of the Landed Gentry, 16th ed., 1939, Genealogical Publishing Company, 1996.