Katherine Frances Jenkinson1 
From 25 November 1833, her married name became Guinness.
Children of Katherine Frances Jenkinson and Richard Samuel Guinness
- Mildred Guinness2 b. 1835
- Edith Frances Sheridan Guinness+2 b. 1837, d. 1899
- Geraldine Henrietta Guinness+2 b. 1838
- Colonel Charles Wolfran Nugent Guinness2 b. 10 Oct 1839, d. 1894
- Arthur Cecil Cope Jenkinson Guinness+1 b. 1841, d. 1 Jun 1897
- Sir Reginald Robert Bruce Guinness+2 b. 9 Sep 1842, d. 9 Jul 1909
- Adelaide Maria Guinness+2 b. 1844, d. 16 Feb 1916
- Claude Hume Campbell Guinness+2 b. 1852, d. 18 Apr 1895
Sir Charles Jenkinson, 10th Bt.1 
He held the office of Member of Parliament (M.P.) for Dover between 1806 and 1816.2 He succeeded as the 10th Baronet Jenkinson, of Walcot, co. Oxford and Hawkesbury, co. Gloucester [E., 1661] on 3 September 1851.2
Children of Sir Charles Jenkinson, 10th Bt. and Katherine Campbell
- Katherine Frances Jenkinson+3 d. 20 Nov 1881
- Eleanora Mary Jenkinson3 d. 14 Oct 1863
- Georgiana Elizabeth Jenkinson+3 b. c 1811, d. 24 Apr 1887
- [S15] George Edward Cokayne, editor, The Complete Baronetage, 5 volumes (no date (c. 1900); reprint, Gloucester, U.K.: Alan Sutton Publishing, 1983), volume III, page 84. Hereinafter cited as The Complete Baronetage.
- [S37] BP2003 volume 2, page 2092. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
Sir Benjamin Lee Guinness, 1st Bt. 
In 1814 he started work at Arthur Guinness.1 He was a partner of Arthur Guinness in 1820.1 He held the office of Lord Mayor of Dublin in 1851.1 In 1855 he purchased Ashford Castle, which was originally a Georgian shooting lodge belonging to Lord Oranmore and Browne, one of whose successors in the title was to marry a Guinness heiress, and was sold by the Encumbered Estates Court to Benjamin Guinness, who then added to it.1 He held the office of Justice of the Peace (J.P.)1 He held the office of Deputy Lieutenant (D.L.)1 He held the office of Member of Parliament (M.P.) (Conservative) for the City of Dublin between 1865 and 1868.1 He was created 1st Baronet Guinness, of Ashford Castle, co. Galway [U.K.] on 15 April 1867, for his restoration of the Cathedral of St. Patrick, Dublin, at his own expense.1
Children of Sir Benjamin Lee Guinness, 1st Bt. and Elizabeth Guinness
- Anne Lee Guinness+2 b. 1839, d. 8 Nov 1889
- Arthur Edward Guinness, 1st and last Baron Ardilaun of Ashford3 b. 1 Nov 1840, d. 20 Jan 1915
- Captain Benjamin Lee Guinness+4 b. 4 Aug 1842, d. 2 Feb 1900
- Edward Cecil Guinness, 1st Earl of Iveagh+2 b. 10 Nov 1847, d. 7 Oct 1927
- [S37] BP2003 volume 2, page 1700. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [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 194. Hereinafter cited as The Complete Peerage.
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 152. Hereinafter cited as The New Extinct Peerage.
Elizabeth Guinness1 
Children of Elizabeth Guinness and Sir Benjamin Lee Guinness, 1st Bt.
- Anne Lee Guinness+3 b. 1839, d. 8 Nov 1889
- Arthur Edward Guinness, 1st and last Baron Ardilaun of Ashford1 b. 1 Nov 1840, d. 20 Jan 1915
- Captain Benjamin Lee Guinness+4 b. 4 Aug 1842, d. 2 Feb 1900
- Edward Cecil Guinness, 1st Earl of Iveagh+ b. 10 Nov 1847, d. 7 Oct 1927
- [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 194. Hereinafter cited as The Complete Peerage.
- [S37] BP2003 volume 2, page 1698. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S21] L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 152. Hereinafter cited as The New Extinct Peerage.
Edward Guinness1 
In 1811 he founded an ironworks at Palmerston and Lucan, County Dublin, but went bankrupt.2 He lived at Dublin, County Dublin, IrelandG.1 He had four sons and three other daughters (all died unmarried.)2
Child of Edward Guinness and Margaret Blair
- Elizabeth Guinness+1 b. 1813, d. 22 Sep 1865
- [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 194. Hereinafter cited as The Complete Peerage.
- [S37] BP2003 volume 2, page 1698. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
Hon. Arthur Ernest Guinness1 
He graduated from Trinity College, Cambridge University, Cambridge, Cambridgeshire, EnglandG, with a Master of Arts (M.A.)1 He gained the rank of Lieutenant in the London Rifle Brigade (1st london Volunteers.)1 He held the office of Deputy Lieutenant (D.L.) of County Dublin.1 He held the office of Justice of the Peace (J.P.) for County Dublin.1
Children of Hon. Arthur Ernest Guinness and Marie Clothilde Russell
- Aileen Sibell Mary Guinness+2 b. 16 May 1904, d. 31 Mar 1999
- Maureen Constance Guinness+2 b. 31 Jan 1907, d. 3 May 1998
- Oonagh Guinness+2 b. 22 Feb 1910, d. 2 Aug 1995
Marie Clothilde Russell1 
Marie Clothilde Russell usually went by her middle name of Clothilde. Her married name became Guinness. She was appointed Dame of Grace, Most Venerable Order of the Hospital of St. John of Jerusalem (D.G.St.J.)1
Children of Marie Clothilde Russell and Hon. Arthur Ernest Guinness
- Aileen Sibell Mary Guinness+2 b. 16 May 1904, d. 31 Mar 1999
- Maureen Constance Guinness+2 b. 31 Jan 1907, d. 3 May 1998
- Oonagh Guinness+2 b. 22 Feb 1910, d. 2 Aug 1995
Valerian Stux-Ryber1
He was an interior decorator.1
- [S37] BP2003 volume 2, page 2067. See link for full details for this source. Hereinafter cited as. [S37]
Aileen Sibell Mary Guinness1 
From 16 November 1927, her married name became Plunket. From 19 December 1956, her married name became Stux-Ryber. In 1965 her name was legally changed to Plunket.1
Children of Aileen Sibell Mary Guinness and F/Lt. Hon. Brindsley Sheridan Bushe Plunket
- Neelia Clothilde Plunket2 b. 10 May 1929, d. Jan 1995
- Doon Aileen Plunket+2 b. 8 Oct 1931
- Marcia Lee Plunket2 b. 2 Mar 1933, d. 25 Dec 1936
Maureen Constance Guinness1 
From 3 July 1930, her married name became Hamilton-Temple-Blackwood. After her marriage, Maureen Constance Guinness was styled as Marchioness of Dufferin and Ava on 21 July 1930. From 14 September 1948, her married name became Buchanan. She was a director of Arthur Guinness, Son & Company in 1949.1 From 20 August 1955, her married name became Maude.
Children of Maureen Constance Guinness and Basil Sheridan Hamilton-Temple-Blackwood, 4th Marquess of Dufferin and Ava
- Lady Caroline Maureen Hamilton-Temple-Blackwood+2 b. 16 Jul 1931, d. 15 Feb 1996
- Lady Perdita Maureen Hamilton-Temple-Blackwood2 b. 17 Jul 1934
- Sheriden Frederick Terence Hamilton-Temple-Blackwood, 5th Marquess of Dufferin and Ava b. 9 Jul 1938, d. 29 May 1988