Mary Purcell1 
From 1741, her married name became Twysden.1
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
Heneage Twysden1 
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
Anne Dyke1 
From 17 July 1802, her married name became Twysden.1
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
Isabella Duncan1 
Her married name became Twysden.1
Children of Isabella Duncan and Captain Thomas Twysden
- Rear-Admiral Henry Duncan Twysden+1 b. 6 Oct 1794, d. 6 Oct 1872
- Reverend Thomas Twysden+1 b. 21 Aug 1801, d. Oct 1887
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
Henry Duncan1
Child of Henry Duncan
- Isabella Duncan+1 d. 1846
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
Rear-Admiral Henry Duncan Twysden1 
He gained the rank of Rear-Admiral in the Royal Navy.1
Children of Rear-Admiral Henry Duncan Twysden and Mary Twysden
- Frances Mary Twysden+1 d. 17 Jul 1892
- Maj.-Gen. Henry Duncan Twysden1 b. 27 Jul 1820, d. 5 Nov 1880
- Heneage Thomas Twysden1 b. 1822, d. 9 Nov 1855
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
Mary Twysden1 
Children of Mary Twysden and Rear-Admiral Henry Duncan Twysden
- Frances Mary Twysden+1 d. 17 Jul 1892
- Maj.-Gen. Henry Duncan Twysden1 b. 27 Jul 1820, d. 5 Nov 1880
- Heneage Thomas Twysden1 b. 1822, d. 9 Nov 1855
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
- [S2821] Nicholas Bowlby, “re: Carew Family,” e-mail message to BENR, 28 May 2008. Hereinafter cited as “re: Carew Family.”
Maj.-Gen. Henry Duncan Twysden1 
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
Margaret Herne1 
From July 1848, her married name became Twysden.1
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
Beresford Herne1
Child of Beresford Herne
- Margaret Herne1 d. 27 Apr 1867
- [S163] Ashworth P. Burke, editor, Burke’s Genealogical and Heraldic History of the Peerage, Baronetage and Knightage, 75th edition (London, U.K.: Harrison and Sons Ltd, 1913), page 1914. Hereinafter cited as Burkes Peerage and Baronetage, 75th ed.
