Henry Grosmont of Derby Plantagenet, 1st Duke of Lancaster1 
He gained the title of Earl of Derby on 16 March 1337.1 He gained the title of Lord of Beaufort and Nogent on 22 September 1345.1 He succeeded as the Earl of Lancaster on 22 September 1345.1 He gained the title of Earl of Leicester on 22 September 1345.1 He was appointed Knight, Order of the Garter (K.G.) in 1348.1 He gained the title of Earl of Lincoln on 20 August 1349.1 He gained the title of 1st Duke of Lancaster on 6 March 1351.1 He gained the title of Earl of Moray on 5 April 1359.1
Children of Henry Grosmont of Derby Plantagenet, 1st Duke of Lancaster and Isabella de Beaumont
- Matilda Plantagenet, Countess of Leicester2 b. 4 Apr 1339, d. 10 Apr 1362
- Blanche of Lancaster, Countess of Derby+2 b. 25 Mar 1345, d. 12 Sep 1369
Isabella de Beaumont1 
Children of Isabella de Beaumont and Henry Grosmont of Derby Plantagenet, 1st Duke of Lancaster
- Matilda Plantagenet, Countess of Leicester2 b. 4 Apr 1339, d. 10 Apr 1362
- Blanche of Lancaster, Countess of Derby+2 b. 25 Mar 1345, d. 12 Sep 1369
Philippa of Lancaster1 
Philippa of Lancaster was born on 31 March 1360 at Leicester Castle, Leicester, Leicestershire, EnglandG.1 She was the daughter of John of Gaunt, Duke of Lancaster and Blanche of Lancaster, Countess of Derby. She married João I de Aviz, Rei de Portugal, son of Pedro I de Bourgogne, Rei de Portugal and Theresa Lourenço Martins, on 11 February 1387 at Oporto Cathedral, Oporto, PortugalG.1 She died on 19 July 1415 at age 55 at Odivelas, PortugalG, from the Bubonic Plague.1 She was buried at Batalha Abbey, PortugalG.1
She was a member of the House of Plantagenet.3 She was appointed Lady Companion, Order of the Garter (L.G.) in 1378.1
Children of Philippa of Lancaster and João I de Aviz, Rei de Portugal
- Blanca de Aviz1 b. 1388, d. 1389
- Alfonso de Aviz1 b. 1390, d. 1400
- Duarte I de Aviz, Rei de Portugal+1 b. 1391, d. 1438
- Pedro de Aviz, Duque de Coimbra+1 b. 1392, d. 1449
- Henrique de Aviz, Duque de Viseu1 b. 1394, d. 1460
- Isabel de Aviz+1 b. 21 Feb 1397, d. 17 Dec 1472
- João de Aviz, Duque de Beja+1 b. 13 Jan 1400, d. 18 Oct 1442
- Ferdinando de Aviz, Grand Master of Aviz1 b. 1402, d. 1443
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 99. Hereinafter cited as Britain’s Royal Families.
- [S130] Wikipedia, online http;//www.wikipedia.org. Hereinafter cited as Wikipedia.
- [S45] Marcellus Donald R. von Redlich, Pedigrees of Some of the Emperor Charlemagne’s Descendants, volume I (1941; reprint, Baltimore, Maryland, U.S.A.: Genealogical Publishing Company, 2002), page 57. Hereinafter cited as Pedigrees of Emperor Charlemagne, I.
Elizabeth Plantagenet1 
She was appointed Lady Companion, Order of the Garter (L.G.) in 1378.2 From 24 June 1380, her married name became Hastings. Her marriage to John de Hastings, 3rd Earl of Pembroke was annulled after 24 September 1383.2 From 24 June 1386, her married name became de Holand. In 1399 she having allegedly lost her heart to her third husband when he triumphed at a tournament.4 From before 12 December 1400, her married name became Cornwall.
Children of Elizabeth Plantagenet and John de Holand, 1st Duke of Exeter
- Richard de Holand2 d. 3 Sep 1400
- Lady Constance de Holand+2 b. 1387, d. 1437
- Alice de Holand2 b. c 1392, d. c 1406
- John de Holand, 1st Duke of Exeter+2 b. c 1395, d. 1447
- Edward de Holand2 b. c 1399, d. a 1413
Children of Elizabeth Plantagenet and John Cornwall, 1st and last Baron of Fanhope
- Constance Cornwall2 d. 1429
- Sir John Cornwall4 b. c 1404, d. Dec 1421
- [S37] BP2003 volume 2, page 1817. See link for full details for this source. Hereinafter cited as. [S37]
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 100. Hereinafter cited as Britain’s Royal Families.
- [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 248. Hereinafter cited as The Complete Peerage.
- [S37] BP2003. [S37]
João I de Aviz, Rei de Portugal1 
João I de Aviz, Rei de Portugal was born on 11 April 1357. He was the son of Pedro I de Bourgogne, Rei de Portugal and Theresa Lourenço Martins.3 He married Philippa of Lancaster, daughter of John of Gaunt, Duke of Lancaster and Blanche of Lancaster, Countess of Derby, on 11 February 1387 at Oporto Cathedral, Oporto, PortugalG.1 He died on 14 August 1433 at age 76 at Lisbon, PortugalG.
He succeeded as the Rei João I de Portugal in 1385.3 He gained the title of Grand Master of Aviz.3 João I de Aviz, Rei de Portugal also went by the nick-name of Joâo ‘the Great’.
Children of João I de Aviz, Rei de Portugal and Inez Perez
- Alfonso I de Bragança, Duque de Bragança+3 b. 1370, d. Dec 1461
- Beatrice de Aviz4 b. b 1395, d. 23 Oct 1439
Children of João I de Aviz, Rei de Portugal and Philippa of Lancaster
- Blanca de Aviz1 b. 1388, d. 1389
- Alfonso de Aviz1 b. 1390, d. 1400
- Duarte I de Aviz, Rei de Portugal+1 b. 1391, d. 1438
- Pedro de Aviz, Duque de Coimbra+1 b. 1392, d. 1449
- Henrique de Aviz, Duque de Viseu1 b. 1394, d. 1460
- Isabel de Aviz+1 b. 21 Feb 1397, d. 17 Dec 1472
- João de Aviz, Duque de Beja+1 b. 13 Jan 1400, d. 18 Oct 1442
- Ferdinando de Aviz, Grand Master of Aviz1 b. 1402, d. 1443
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 99. Hereinafter cited as Britain’s Royal Families.
- [S4893] Anonymous, “re: Castañeda Family between La Palma and Cuba,” family provided evidence then verified by subsequent research and verification by BENR (101053), 12 September 2010. Hereinafter cited as “re: Castañeda Family.”
- [S16] Jirí Louda and Michael MacLagan, Lines of Succession: Heraldry of the Royal Families of Europe, 2nd edition (London, U.K.: Little, Brown and Company, 1999), table 116. Hereinafter cited as Lines of Succession.
- [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 246. Hereinafter cited as The Complete Peerage.
Alice Hayles1 
She was also known as Alice Halys.
Children of Alice Hayles and Thomas of Brotherton, 1st Earl of Norfolk
- Edward of Brotherton b. c 1319, d. b 13 Sep 1337
- Margaret Marshall of Brotherton, Duchess of Norfolk+2 b. c 1321, d. 24 Mar 1398/99
- Alice of Norfolk+2 b. c 1324, d. Nov 1351
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 85. Hereinafter cited as Britain’s Royal Families.
- [S106] Royal Genealogies Website (ROYAL92.GED), online http://www.daml.org/2001/01/gedcom/royal92.ged. Hereinafter cited as Royal Genealogies Website.
Margaret Wake, Baroness Wake1 
She succeeded as the 3rd Baroness Wake [E., 1295] on 30 May 1349.1
Child of Margaret Wake, Baroness Wake and John Comyn of Badenoch
- Aymer Comyn1 b. b 1315, d. b 1316
Children of Margaret Wake, Baroness Wake and Edmund of Woodstock, 1st Earl of Kent
- Edmund Plantagenet, 2nd Earl of Kent4 b. c 1326, d. b 5 Oct 1331
- Margaret Plantagenet4 b. 1327, d. b 1352
- Joan of Kent, Countess of Kent+ b. 29 Sep 1328, d. 8 Aug 1385
- John Plantagenet, 3rd Earl of Kent4 b. 7 Apr 1330, d. 26 Dec 1352
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 87. Hereinafter cited as Britain’s Royal Families.
- [S3945] Peter Llewelyn, “re: Mansel Family,” family provided evidence then verified by subsequent research and verification by BENR (101053), 31 August 2009. Hereinafter cited as “re: Mansel Family.”
- [S37] BP2003 volume 3, page 4023. See link for full details for this source. Hereinafter cited as. [S37]
- [S106] Royal Genealogies Website (ROYAL92.GED), online http://www.daml.org/2001/01/gedcom/royal92.ged. Hereinafter cited as Royal Genealogies Website.
Constance de Bretagne, Duchesse de Bretagne1 
She gained the title of Duchesse de Bretagne in July 1181.5
Children of Constance de Bretagne, Duchesse de Bretagne and Geoffrey II Plantagenet, Earl of Richmond
- Eleanor ‘Maid of Brittany’ Plantagenet, Countess of Richmond b. c 1185, d. 10 Aug 1241
- Matilda Plantagenet5 b. c 1185
- Arthur Plantagenet, Earl of Richmond b. 29 Mar 1187, d. 3 Apr 1203
Children of Constance de Bretagne, Duchesse de Bretagne and Guy de Thouars
- Alice de Thouars, Duchesse de Bretagne+4 b. 1201, d. 1221
- Katherine de Thouars+4 b. 1201, d. bt 1237 – 1240
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 195. Hereinafter cited as Britain’s Royal Families.
- [S11] Alison Weir, Britain’s Royal Families, page 60.
- [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 III, page 168. Hereinafter cited as The Complete Peerage.
- [S11] Alison Weir, Britain’s Royal Families, page 61.
- [S106] Royal Genealogies Website (ROYAL92.GED), online http://www.daml.org/2001/01/gedcom/royal92.ged. Hereinafter cited as Royal Genealogies Website.
Arthur Plantagenet, Earl of Richmond1 
He gained the title of Duc de Bretagne on 29 March 1187.2 He gained the title of Earl of Richmond on 18 April 1199.2
On his father’s death, Arthur by the law of primogeniture should have succeeded to the English crown and the French King, Phillip II, upheld his claims, until John bought him over to a ‘disgraceful’ treaty. Arthur soon fell into his uncle’s hands, and was imprisoned, first at Falaise, afterwards at Rouen, where, on 3 April 1203, he is supposed to have perished, either by assassination or by drowning in an attempt to escape. He has an extensive biographical entry in the Dictionary of National Biography.3
- [S106] Royal Genealogies Website (ROYAL92.GED), online http://www.daml.org/2001/01/gedcom/royal92.ged. Hereinafter cited as Royal Genealogies Website.
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 61. Hereinafter cited as Britain’s Royal Families.
- [S18] Matthew H.C.G., editor, Dictionary of National Biography on CD-ROM (Oxford, U.K.: Oxford University Press, 1995), reference “Arthur, 1187-1203”. Hereinafter cited as Dictionary of National Biography.
Berengaria de Navarre1 
After her marriage, Berengaria de Navarre was styled as Queen Consort Berengaria of England on 12 May 1191.2
- [S106] Royal Genealogies Website (ROYAL92.GED), online http://www.daml.org/2001/01/gedcom/royal92.ged. Hereinafter cited as Royal Genealogies Website.
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 65. Hereinafter cited as Britain’s Royal Families.
- [S11] Alison Weir, Britain’s Royal Families, page 64.
