David Llewelyn 
Born: 28 December 1824 and baptised 23 January 1825 in St Tydfil the Martyr Parish Church, Merthyr Tydfil, Glamorgan, WalesDied: 14 November 1877 in Tirfounder Road, Aberdare, Glamorgan, Wales and buried in Aberdare Cemetary
David's Family
Spouse: Sarah married 3 February 1845 in Merthyr Tydfil, Glamorgan, Wales
David's Heritage
Parents: Margaret Morris, William Llewelyn
Siblings: Margaret Llewelyn, Ann Llewelyn, Elizabeth Llewelyn, Ann Llewelyn, Tabitha Llewelyn, Cesiah Llewelyn,Cesiah Llewelyn
1861 Census Dyffryn, Aberdare, Merthyr Tydfil, Glamorgan
| Name | Position | Age | Where Born | Occupation | BK No |
| David Llewelyn | Head | 36 | Merthyr,Glamorgan | Collier | 553 |
| Sarah Llewelyn | Wife | 39 | Neath,Glamorgan | Collier's Wife | |
| Catherine Thomas | Niece | 5 | Aberdare,Glamorgan | Scholar |
1851 Census Brick Houses, Aberdare, Merthyr Tydfil, Glamorgan
| Name | Position | Age | Where Born | Occupation | BK No |
| David Llewelyn | Head | 27 | Merthyr,Glamorgan | Coal Miner | 553 |
| Sarah Llewelyn | Wife | 30 | Merthyr,Glamorgan |
1841 Census Abercanaid,"The remaining part of the hamlet to the south of No 20" 46 059 057 Abercanaid
| Name | Position | Age | Where Born | Occupation | BK No |
| Margaret Llewelyn | Head | 35 | In County | 555 | |
| Tabitha Llewelyn | Sister | 20 | In County | 554 | |
| David Llewelyn | Brother | 15 | In County | Coal Miner | 553 |
| Keziah Llewelyn | Sister | 14 | In County | 506 |