William Dillwyn1 
He lived at Higham Lodge, Walthamstow, Essex, EnglandG.1
Child of William Dillwyn and Sarah Weston
- Lewis Weston Dillwyn+3 b. 21 Aug 1778, d. 1855
Sarah Weston1
From November 1777, her married name became Dillwyn.
Child of Sarah Weston and William Dillwyn
- Lewis Weston Dillwyn+3 b. 21 Aug 1778, d. 1855
Lewis Weston Dillwyn1 
He held the office of High Sheriff of Glamorgan in 1818.1 He was appointed Fellow, Royal Society (F.R.S.)1 He held the office of Member of Parliament (M.P.) for Glamorgan in 1832.3 He held the office of Justice of the Peace (J.P.) for Glamorgan.1 He held the office of Deputy Lieutenant (D.L.) of Glamorgan.3 He lived at Sketty Hall, Glamorgan, Wales.1 He lived at Burrough Lodge, Glamorgan, Wales.1
Children of Lewis Weston Dillwyn and Mary Llewelyn
- John Dillwyn-Llewelyn+2 d. 24 Aug 1882
- Fanny Llewelyn Dillwyn2 d. 7 Aug 1894
- Mary Dillwyn2 d. 29 Nov 1906
- Lewis Llewelyn Dillwyn2 b. 19 May 1814, d. 19 Jun 1892
John Llewelyn1
Child of John Llewelyn
- Mary Llewelyn+2 d. 1865
Mary Llewelyn1 
From 13 July 1807, her married name became Dillwyn.
Children of Mary Llewelyn and Lewis Weston Dillwyn
- John Dillwyn-Llewelyn+2 d. 24 Aug 1882
- Fanny Llewelyn Dillwyn2 d. 7 Aug 1894
- Mary Dillwyn2 d. 29 Nov 1906
- Lewis Llewelyn Dillwyn2 b. 19 May 1814, d. 19 Jun 1892
John Dillwyn-Llewelyn1 
He held the office of Deputy Lieutenant (D.L.) of Glamorgan.1 He was appointed Fellow, Royal Society (F.R.S.)1 He was given the name of John Dillwyn at birth.1 He held the office of Justice of the Peace (J.P.) for Glamorgan.1 He lived at Penllergaer, Glamorgan, WalesG.1
Children of John Dillwyn-Llewelyn and Emma-Thomasina Talbot
- Emma Charlotte Dillwyn-Llewelyn2
- Ellinor Amy Dillwyn-Llewelyn2
- Lucy Catharine Dillwyn-Llewelyn2 d. 1 Apr 1920
- Theresa Mary Dillwyn-Llewelyn+2 b. 1834, d. 1926
- Sir John Talbot Dillwyn-Llewelyn, 1st Bt.+2 b. 26 May 1836, d. 6 Jul 1927
Lewis Llewelyn Dillwyn1 
He was Lieutenant-Colonel of the 3rd Glamorgan RV.1 He was Member of Parliament (M.P.) Swansea in 1855.1 He held the office of Deputy Lieutenant (D.L.) of Glamorgan.1 He held the office of Justice of the Peace (J.P.) for Glamorgan.1 He lived at Hendrefollan, Glamorgan, WalesG.1
Elizabeth de la Beche1 
From 16 August 1838, her married name became Dillwyn.
Fanny Llewelyn Dillwyn1 
From 1836, her married name became Moggridge.1
Matthew Moggridge1 
He held the office of Justice of the Peace (J.P.)1 He lived at Woodfield, Monmouthshire, WalesG.1 From 1836, his married name became Dillwyn.