Sir Thomas Lambert1 
- [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume I, page 152. Hereinafter cited as The Complete Peerage.
Margaret Louise Bateman1 
- [S3706] David Barttelot, “re: Crosland Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 7 April 2009. Hereinafter cited as “re: Crosland Family.”
Matilda de Holand1 
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 93. Hereinafter cited as Britain’s Royal Families.
- [S105] Brain Tompsett, Royal Genealogical Data, online http://www3.dcs.hull.ac.uk/genealogy/royal/. Hereinafter cited as Royal Genealogical Data.
- [S37] BP2003 volume 1, page 1123. See link for full details for this source. Hereinafter cited as. [S37]
Agnes de St. John1 
From 1292, her married name became de Courtenay. After her marriage, Agnes de St. John was styled as Countess of Devon on 22 February 1334/35.
Children of Agnes de St. John and Hugh de Courtenay, 1st Earl of Devon
- Elizabeth de Courtney+3
- Hugh de Courtenay, 2nd Earl of Devon+1 b. 12 Jul 1303, d. 2 May 1377
- Thomas Courtenay+2 b. 1311, d. 1362
- [S37] BP2003 volume 1, page 1122. See link for full details for this source. Hereinafter cited as. [S37]
- [S1916] Tim Boyle, “re: Boyle Family,” e-mail message to BENR, 16 September 2006. Hereinafter cited as “re: Boyle Family.”
- [S22] Sir Bernard Burke, C.B. LL.D., A Genealogical History of the Dormant, Abeyant, Forfeited, and Extinct Peerages of the British Empire, new edition (1883; reprint, Baltimore, Maryland: Genealogical Publishing Company, 1978), page 141. Hereinafter cited as Burkes Extinct Peerage.
John de St. John1 
Children of John de St. John and Alice FitzPiers
- Edward de St. John+ b. 1259, d. 30 Nov 1368
- Agnes de St. John+1 b. 1275, d. 11 Jun 1345
- [S37] BP2003 volume 1, page 1122. See link for full details for this source. Hereinafter cited as. [S37]
Alice FitzPiers
Children of Alice FitzPiers and John de St. John
- Edward de St. John+ b. 1259, d. 30 Nov 1368
- Agnes de St. John+ b. 1275, d. 11 Jun 1345
Reynold FitzPiers
Child of Reynold FitzPiers
Eleanor le Despencer1 
Children of Eleanor le Despencer and Sir Hugh de Courtenay
- Isabel Courtenay+
- Eleanor de Courtenay+
- Margaret de Courtenay2 d. 18 Mar 1349
- John Courtenay
- Philip Courtenay
- Aveline de Courtenay+
- Hugh de Courtenay, 1st Earl of Devon+1 b. c 1276, d. 23 Dec 1340
Lady Isabel de Vere1
She was living in February 1298/99.1
Child of Lady Isabel de Vere and John de Courtenay
- Sir Hugh de Courtenay+1 b. 25 Mar 1249, d. 28 Feb 1291/92
- [S37] BP2003 volume 1, page 1122. See link for full details for this source. Hereinafter cited as. [S37]
Hugh de Vere, 4th Earl of Oxford1 
He held the office of Hereditary Master Chamberlain of England from 1221 to 1263.2 He succeeded as the 4th Earl of Oxford [E., 1142] on 25 October 1221.2 He was appointed Knight in 1233.2 He was styled as Baron de Bolebec in February 1245.1
Children of Hugh de Vere, 4th Earl of Oxford and Hawise de Quincy
- Lady Isabel de Vere+3
- Lady Margaret de Vere2
- Lady Laura de Vere+4 d. 1292
- Robert de Vere, 5th Earl of Oxford+2 b. c 1240, d. b 7 Sep 1296
- [S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume II, page 203. Hereinafter cited as The Complete Peerage.
- [S37] BP2003 volume 3, page 3464. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S6] Cokayne, and others, The Complete Peerage, volume I, page 196.
