Isabel de Bigod  24
- Born: Abt 1222, Thetford, Norfolk, England
- Marriage (1): Gilbert de Lacy 
- Marriage (2): John FitzGeoffrey Lord Kirtling, Justiciar of Ireland  after 1230
- Died: 1239 about age 17
See The House of Clifford, p55. The Complete Peerage, V.ix, p590, note c.
The Complete Peerage v.V,p.434,note a & vol.IX,p.590,note c.
Our lines of ascent runs to Maud Marshal, Marshall of England through bo th of her marriages.
1st Marriage Hugh of Norfolk Bigod, 3rd Earl of Norfolk
our line runs through their third child Isabel de Bigod.
ALICE OF ARUNDEL15 FITZALAN, LADY, ELEANOR14 PLANTAGENET, MAUD13 CHAWORT H, ISABELLA12 DE BEAUCHAMP, MAUD11 FITZJOHN, ISABEL10 DE BIGOD,
2nd Marriage William de Warren, 6th Earl of Warren & Surrey
our line runs through their first son John de Warren, 7th Earl of Warr en & Surrey
ALICE OF ARUNDEL6 FITZALAN, LADY, Richard Fitzalan, 10th Earl of Arundel 5, ALICE4 DE WARENNE, WILLIAM3 DE WARENNE, JOHN2 DE WARREN, 7TH EARL OF WA RREN & SURREY
some sources shows Isabel as daughter of Sir Ralph and granddaught er of the 3rd Earl.
Isabel married Gilbert de Lacy  [MRIN: 1675], son of Walter de Lacy Lord of Meath  and Margaret de Braose Lady of Trim . (Gilbert de Lacy  died in 1230 in Llanthony Priory, Wales and was buried in Llanthony Priory, Wales.)
Isabel next married John FitzGeoffrey Lord Kirtling, Justiciar of Ireland  [MRIN: 1673], son of Geoffrey FitzPiers 4th Earl of Essex  and Eveline (Aveline) de Clare , after 1230. (John FitzGeoffrey Lord Kirtling, Justiciar of Ireland  was born about 1215 in Shere, Surrey, England and died on 23 Nov 1258.)