Margaret of Bohemia1 
Child of Margaret of Bohemia and Johann III Burggraf von Nürnberg
- Elisabeth von Hohenzollern+ b. bt 1391 – 1392, d. 1429
- [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 87. Hereinafter cited as Lines of Succession.
- [S2453] Laurie Coster, “re: Luxembourg Family,” e-mail message to BENR, 5 October 2007. Hereinafter cited as “re: Luxembourg Family.”
John de Holand, 1st Duke of Exeter1 
He gained the title of 2nd Earl of Huntingdon.5 He held the office of Lord of Acquitaine in 1439.5,7 He was created 1st Duke of Exeter [England] on 6 January 1443/44.8
Children of John de Holand, 1st Duke of Exeter and Lady Anne Stafford
- Henry de Holand, 2nd Duke of Exeter+2 b. 27 Jun 1430, d. 1475
- Lady Anne Holand+6 b. b 1432, d. 26 Dec 1486
- [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 V, page 205. Hereinafter cited as The Complete Peerage.
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 97. Hereinafter cited as Britain’s Royal Families.
- [S11] Alison Weir, Britain’s Royal Families, page 100.
- [S6] Cokayne, and others, The Complete Peerage, volume XII/2, page 550.
- [S6] Cokayne, and others, The Complete Peerage, volume I, page 246.
- [S6] Cokayne, and others, The Complete Peerage, volume IV, page 437.
- [S2] Peter W. Hammond, editor, The Complete Peerage or a History of the House of Lords and All its Members From the Earliest Times, Volume XIV: Addenda & Corrigenda (Stroud, Gloucestershire, U.K.: Sutton Publishing, 1998), page 38. Hereinafter cited as The Complete Peerage, Volume XIV.
- [S6] Cokayne, and others, The Complete Peerage, volume V, page 208.
Thomas Beaufort1 
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 105. Hereinafter cited as Britain’s Royal Families.
Constance Langley1 
She was a member of the House of Plantagenet.2 She was appointed Lady Companion, Order of the Garter (L.G.) in 1386.2
Children of Constance Langley and Thomas le Despenser, 1st and last Earl of Gloucester
- Edward le Despenser2
- Elizabeth le Despenser2 d. c 1398
- Richard le Despenser, 4th Lord Burghersh2 b. 30 Nov 1396, d. 7 Oct 1414
- Hugh le Despenser2 b. c 1400, d. 1401
- Isabel le Despenser+2 b. 26 Jul 1400, d. 27 Dec 1439
Child of Constance Langley and Edmund de Holand, 4th/7th Earl of Kent
- Eleanor de Holand+3 b. c 1406
- [S125] Richard Glanville-Brown, online <e-mail address>, Richard Glanville-Brown (RR 2, Milton, Ontario, Canada), downloaded 17 August 2005.
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 110. Hereinafter cited as Britain’s Royal Families.
- [S11] Alison Weir, Britain’s Royal Families, page 111.
Mary Anne Clarke1
- [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 XII/2, page 922. Hereinafter cited as The Complete Peerage.
Sir Robert d’Aguillon1 
He lived at Watton at Stone, Hertfordshire, EnglandG.1 He lived at Addington, Surrey, EnglandG.1
Child of Sir Robert d’Aguillon and Joan de Ferrers
- Isabel Aguillon+1 b. 25 Mar 1258, d. b 28 May 1323
- [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 417. Hereinafter cited as The Complete Peerage.
- [S7732] Geni, online https://www.geni.com. Hereinafter cited as Geni.
Sophie Prinzessin von Liegnitz 
Child of Sophie Prinzessin von Liegnitz and Johann Georg Kurfürst von Brandenburg
- Joachim Friedrich Kurfürst von Brandenburg+ b. 27 Jan 1546, d. 18 Jul 1608
- [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 92. Hereinafter cited as Lines of Succession.
Catherine Manners, Baroness de Ros of Helmsley1,2 

by Beaubrun, 1628 3
Catherine Manners, Baroness de Ros of Helmsley was born in 1603.3 She was the daughter of Francis Manners, 6th Earl of Rutland and Frances Knyvett.2 She married, firstly, George Villiers, 1st Duke of Buckingham, son of Sir George Villiers and Mary Beaumont, Countess of Buckingham, on 16 May 1620.1 She married, secondly, Sir Randal Mac Donnell, 1st Marquess of Antrim, son of Randal Mac Sorley Mac Donnell, 1st Earl of Antrim and Alice O’Neill, before 12 April 1635.1 She died in October 1649 at Waterford, County Waterford, IrelandG.1 She died intestate and her estate was administered on 20 November 1663.2
After her marriage, Catherine Manners, Baroness de Ros of Helmsley was styled as Marchioness of Buckingham on 16 May 1620. From 16 May 1620, her married name became Villiers. After her marriage, Catherine Manners, Baroness de Ros of Helmsley was styled as Duchess of Buckingham on 18 May 1623. After her marriage, Catherine Manners, Baroness de Ros of Helmsley was styled as Dowager Duchess of Buckingham on 23 August 1628.2 She succeeded as the 18th Baroness de Ros of Helmsley [E., 1299] on 17 December 1632, suo jure.2 From before 12 April 1635, her married name became Mac Donnell.1 After her marriage, Catherine Manners, Baroness de Ros of Helmsley was styled as Countess of Antrim on 10 December 1636. From 1642 to 1643 she was deeply engaged with the Irish Roman Catholic rebels.1 After her marriage, Catherine Manners, Baroness de Ros of Helmsley was styled as Marchioness of Antrim on 26 January 1644/45.
Clarendon remarks of her that “besides her great extraction and fortune, she was of a very great wit and spirit.”2
Children of Catherine Manners, Baroness de Ros of Helmsley and George Villiers, 1st Duke of Buckingham
- Lady Mary Villiers+4 b. c 1622, d. c Nov 1685
- Charles Villiers, Marquess of Buckingham1 b. 17 Nov 1625, d. 16 Mar 1626/27
- George Villiers, 2nd Duke of Buckingham5 b. 30 Jan 1627/28, d. 16 Apr 1687
- Francis Villiers3 b. 1629, d. 1648
- [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 394. Hereinafter cited as The Complete Peerage.
- [S6] Cokayne, and others, The Complete Peerage, volume I, page 174.
- [S3409] Caroline Maubois, “re: Penancoet Family,” e-mail message to BENR, 2 December 2008. Hereinafter cited as “re: Penancoet Family.”
- [S6] Cokayne, and others, The Complete Peerage, volume II, page 393.
- [S6] Cokayne, and others, The Complete Peerage, volume II, page 395.
unknown daughter of Scotland1
Children of unknown daughter of Scotland and Olaf Cuaran, King of Northumbria
- Gluniarainn, King of Dublin1 d. 989
- Sithric, King of Dublin1 d. 1042
- Reginald (?)1 d. 980
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 170. Hereinafter cited as Britain’s Royal Families.
Olaf Cuaran, King of Northumbria1 
Children of Olaf Cuaran, King of Northumbria and unknown daughter of Scotland
- Gluniarainn, King of Dublin1 d. 989
- Sithric, King of Dublin1 d. 1042
- Reginald (?)1 d. 980
- [S11] Alison Weir, Britain’s Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 170. Hereinafter cited as Britain’s Royal Families.