Jean Jacques Lavit1 
He was also known as I. L. Lavit.2
Children of Jean Jacques Lavit and Isabella Roper
- Alexandrine Henrietta Wilhelmine Lavit+ d. 5 Dec 1875
- Albertine Eugenie Elizabeth Lavit+ b. 13 Sep 1835, d. 25 Apr 1921
Otho FitzGerald
Geraldine FitzGerald 
Charles de Blaquiere1 
Children of Charles de Blaquiere and Agnes (?)
- Hon. Louisa Agnes de Blaquiere2
- Peter Henry de Blaquiere2 b. 5 Aug 1849, d. Apr 1887
- William de Blaquiere, 6th Baron de Blaquiere of Ardkill+1 b. 5 Sep 1856, d. 28 Jul 1920
- [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 IV, page 110. 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 100. Hereinafter cited as The New Extinct Peerage.
Agnes (?)1 
From before 1848, her married name became Lawson.1 Her married name became de Blaquiere.
Children of Agnes (?) and Charles de Blaquiere
- Hon. Louisa Agnes de Blaquiere2
- Peter Henry de Blaquiere2 b. 5 Aug 1849, d. Apr 1887
- William de Blaquiere, 6th Baron de Blaquiere of Ardkill+1 b. 5 Sep 1856, d. 28 Jul 1920
- [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 IV, page 110. 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 100. Hereinafter cited as The New Extinct Peerage.
Caroline Dora Bettridge1
Her married name became de Blaquiere.
- [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 100. Hereinafter cited as The New Extinct Peerage.
Peter Henry de Blaquiere1 
- [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 100. Hereinafter cited as The New Extinct Peerage.
Lt. Hon. John de Blaquiere1

He was educated in 1903 at Winchester College, Winchester, Hampshire, EnglandG.2 He gained the rank of Lieutenant in January 1913 in the Scottish Rifles.1 He fought in the First World War.1
- [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 IV, page 110. Hereinafter cited as The Complete Peerage.
- [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 239. Hereinafter cited as The Complete Peerage, Volume XIV.
Sub-Lt. Hon. Alan Boyle de Blaquiere1

He fought in the First World War.2 He gained the rank of Sub-Lieutenant in the Royal Navy.2
- [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 IV, page 110. Hereinafter cited as The Complete Peerage.
- [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 239. Hereinafter cited as The Complete Peerage, Volume XIV.
James Carleton Harris, 7th Earl of Malmesbury1
He was styled as Viscount FitzHarris between 1950 and 2000. He was educated at Eton College, Windsor, Berkshire, EnglandG.1 He graduated from St. Andrew’s University, St. Andrews, Fife, ScotlandG, with a Master of Arts (M.A.)1 He succeeded as the 7th Earl of Malmesbury [G.B., 1800] on 11 November 2000.1 He succeeded as the 7th Viscount FitzHarris, of Hurn Court, co. Southampton [G.B., 1800] on 11 November 2000.1 He succeeded as the 7th Baron Malmesbury, of Malmesbury, co. Wilts [G.B., 1788] on 11 November 2000.1
Children of James Carleton Harris, 7th Earl of Malmesbury and Sally Ann Rycroft
- James Hugh Carleton Harris, Viscount FitzHarris+1 b. 29 Apr 1970
- Hon. Charles Edward Harris1 b. 26 Apr 1972
- Hon. Guy Richard Harris1 b. 28 Apr 1975
- Lady Frances Maria Harris+1 b. 1979
- Lady Daisy Catherine Harris1 b. 1981