Martha Matilda Somerville1 
From 1 April 1773, her married name became Hamilton.1 After her marriage, Martha Matilda Somerville was styled as Viscountess Boyne on 30 July 1789. From 11 July 1821, her married name became Webb.2
Children of Martha Matilda Somerville and Gustavus Hamilton, 5th Viscount Boyne
- Hon. Georgiana Hamilton+3
- Gustavus Hamilton, 6th Viscount Boyne+2 b. 12 Apr 1777, d. 30 Mar 1855
- [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 17. Hereinafter cited as The New Extinct Peerage.
- [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 268. Hereinafter cited as The Complete Peerage.
- [S8960] Susan Briscoe, “re: Brisco Family,” e-mail message to Harry Berkeley, 2 April 2020. Hereinafter cited as “re: Brisco Family.”
Gustavus Hamilton, 5th Viscount Boyne1 
He held the office of Sheriff of County Meath in 1774.2 He succeeded as the 5th Viscount Boyne, in the province of Leinster [I., 1717] on 30 July 1789.2 After his marriage, Gustavus Hamilton, 5th Viscount Boyne was styled as 5th Baron Hamilton of Stackallan [I., 1715] on 30 July 1789.2
Children of Gustavus Hamilton, 5th Viscount Boyne and Martha Matilda Somerville
- Hon. Georgiana Hamilton+3
- Gustavus Hamilton, 6th Viscount Boyne+2 b. 12 Apr 1777, d. 30 Mar 1855
- [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 17. Hereinafter cited as The New Extinct Peerage.
- [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 268. Hereinafter cited as The Complete Peerage.
- [S8960] Susan Briscoe, “re: Brisco Family,” e-mail message to Harry Berkeley, 2 April 2020. Hereinafter cited as “re: Brisco Family.”
Catherine Crofton1 
From 16 June 1770, her married name became Somerville.1
Child of Catherine Crofton and Sir James Quaile Somerville, 3rd Bt.
- Sir Marcus Somerville, 4th Bt.+1 d. 11 Jul 1831
- [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 17. Hereinafter cited as The New Extinct Peerage.
- [S37] BP2003 See link for full details for this source. Hereinafter cited as. [S37]
Sir Marcus Lowther-Crofton, 1st Bt.1 
He was given the name of Marcus Lowther at birth.1 In 1745 his name was legally changed to Marcus Lowther-Crofton.2 He held the office of Member of Parliament (M.P.) for Ratoath between 1753 and 1760.2 He was created 1st Baronet Lowther-Crofton, of The Moate, co. Roscommon [Ireland] on 12 June 1758.4 He held the office of Member of Parliament (M.P.) for Roscommon Borough between 1761 and 1768.2 He held the office of Member of Parliament (M.P.) for Ratoath between 1769 and 1776.2
Children of Sir Marcus Lowther-Crofton, 1st Bt. and Catherine Crofton
- Catherine Crofton+4 d. 1775
- Sir Edward Crofton, 2nd Bt.+1 d. 30 Sep 1797
- Sophia Jane Crofton3 d. Dec 1777
- John Frederick Lowther Crofton+3 b. 13 Oct 1758
- William Henry Crofton+3 b. 28 Feb 1762, d. 21 Aug 1794
- [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 543. Hereinafter cited as The Complete Peerage.
- [S37] BP2003 volume 1, page 970. 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 17. Hereinafter cited as The New Extinct Peerage.
Elizabeth Campbell-Johnston1 
- [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.”
Louis Campbell-Johnston1 
In 1927 he founded the British Humane Society.1
- [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.”
Hon. Marcus Edward Francis Meredyth Somerville1 
- [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 18. Hereinafter cited as The New Extinct Peerage.
Lilias Drummond1 
After her marriage, Lilias Drummond was styled as Countess of Tullibardine before 12 June 1668. From before 12 June 1668, her married name became Murray.1 After her marriage, Lilias Drummond was styled as Countess of Perth circa 5 October 1676. After her marriage, Lilias Drummond was styled as Drummond circa 5 October 1676.
Child of Lilias Drummond and James Drummond, 4th Earl of Perth
- John Drummond, 5th Duke of Perth2 b. 1679, d. 27 Oct 1757
- [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 69. Hereinafter cited as The Complete Peerage.
- [S37] BP2003 volume 3, page 3103. See link for full details for this source. Hereinafter cited as. [S37]
Alice Grant1
Her married name became Dent.1 From 10 April 1596, her married name became Cæser.1
Child of Alice Grant and John Dent
- Elizabeth Dent+1 b. 18 Oct 1591, d. c Feb 1655/56
- [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 66. Hereinafter cited as The Complete Peerage.
Christopher Grant1
Child of Christopher Grant
- [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 66. Hereinafter cited as The Complete Peerage.