Isabel Elphinstone1
Children of Isabel Elphinstone and Andrew Houstoun of Calderhall
- Alexander Houstoun1
- Andrew Houstoun of Calderhaugh+2 b. 25 Dec 1702, d. 28 Jul 1786
Andrew Houstoun of Calderhaugh1 
Child of Andrew Houstoun of Calderhaugh and Nellie Waddell
- General Sir William Houstoun of Calderhall, 1st Bt.+2 b. 10 Aug 1766, d. 8 Apr 1842
Nellie Waddell1
Her married name became Calderhaugh.
Child of Nellie Waddell and Andrew Houstoun of Calderhaugh
- General Sir William Houstoun of Calderhall, 1st Bt.+2 b. 10 Aug 1766, d. 8 Apr 1842
General Sir William Houstoun of Calderhall, 1st Bt.1 
He gained the rank of Colonel in the 20th Regiment.1 He was appointed Knight Grand Cross, Order of the Bath (G.C.B.)1 He was appointed Knight Grand Cross, Hanoverian Order (G.C.H.)1 He was created 1st Baronet Houstoun, of Calderhall [U.K.] on 19 July 1836.1
Children of General Sir William Houstoun of Calderhall, 1st Bt. and Lady Jane Maitland
- Colonel Sir George Augustus Frederick Houstoun-Boswall of Blackadder, 2nd Bt.+2 b. 4 Oct 1809, d. 8 Jan 1886
- William Houstoun+1 b. 23 Feb 1811, d. 23 Oct 1872
Grace Violet Platts1 
Her married name became Odell.1
Colonel Sir George Augustus Frederick Houstoun-Boswall of Blackadder, 2nd Bt.1 
He was given the name of George Augustus Frederick Houstoun at birth.1 He succeeded as the 2nd Baronet Houstoun, of Calderhall [U.K., 1836] on 8 April 1842.1 He held the office of Deputy Lieutenant (D.L.) of Berwickshire.1 He gained the rank of Colonel in the Grenadier Guards.1
Children of Colonel Sir George Augustus Frederick Houstoun-Boswall of Blackadder, 2nd Bt. and Euphemia Boswall
- Sir George Lauderdale Houstoun-Boswall of Blackadder, 3rd Bt.+2 b. 11 Dec 1847, d. 8 Feb 1908
- William Houstoun-Boswall-Preston2 b. 11 Apr 1849, d. 1885
- Thomas Alford Houstoun-Boswall-Preston+2 b. 21 Jul 1850, d. 3 Jan 1918
- Robert Houstoun-Boswall-Preston2 b. 11 Dec 1852, d. 12 Feb 1913
- Alfred Houstoun-Boswall+2 b. 13 Feb 1854, d. 29 Apr 1920
- Evelyn Lucy Houstoun-Boswall2 b. 13 Feb 1854, d. 5 Dec 1932
Euphemia Boswall1 
Children of Euphemia Boswall and Colonel Sir George Augustus Frederick Houstoun-Boswall of Blackadder, 2nd Bt.
- Sir George Lauderdale Houstoun-Boswall of Blackadder, 3rd Bt.+2 b. 11 Dec 1847, d. 8 Feb 1908
- William Houstoun-Boswall-Preston2 b. 11 Apr 1849, d. 1885
- Thomas Alford Houstoun-Boswall-Preston+2 b. 21 Jul 1850, d. 3 Jan 1918
- Robert Houstoun-Boswall-Preston2 b. 11 Dec 1852, d. 12 Feb 1913
- Alfred Houstoun-Boswall+2 b. 13 Feb 1854, d. 29 Apr 1920
- Evelyn Lucy Houstoun-Boswall2 b. 13 Feb 1854, d. 5 Dec 1932
Sir George Lauderdale Houstoun-Boswall of Blackadder, 3rd Bt.1 
He was Convenor of the Berwickshire County Council.1 He gained the rank of Captain in the Grenadier Guards.1 He succeeded as the 3rd Baronet Houstoun, of Calderhall [U.K., 1836] on 8 January 1886.1 He held the office of Deputy Lieutenant (D.L.) of Berwickshire.1
Children of Sir George Lauderdale Houstoun-Boswall of Blackadder, 3rd Bt. and Phoebe Allan
- Evelyn Mary Alice Houstoun-Boswall2
- Sir George Reginald Houstoun-Boswall of Blackadder, 4th Bt.+2 b. 6 Dec 1877, d. 27 Sep 1915
- Sir Thomas Randolph Houstoun-Boswall of Blackadder, 5th Bt.+2 b. 5 Feb 1882, d. 4 Dec 1953
Sir Hugh Allan1
Child of Sir Hugh Allan
- Phoebe Allan+3 d. 24 Dec 1904
Phoebe Allan1 
From 1 March 1877, her married name became Houstoun-Boswall.1
Children of Phoebe Allan and Sir George Lauderdale Houstoun-Boswall of Blackadder, 3rd Bt.
- Evelyn Mary Alice Houstoun-Boswall2
- Sir George Reginald Houstoun-Boswall of Blackadder, 4th Bt.+2 b. 6 Dec 1877, d. 27 Sep 1915
- Sir Thomas Randolph Houstoun-Boswall of Blackadder, 5th Bt.+2 b. 5 Feb 1882, d. 4 Dec 1953
