Mary Ann Williams 
Born: 1863 in Merthyr Tydfil, Glamorgan, WalesMary Ann's Heritage
Parents: Lewis Williams, Cesiah Llewelyn
Siblings: Martha Williams, William Williams, Margaret Williams, Lewis Williams, Kezia Williams, John Williams, Elizabeth Williams
1871 Census Merthyr Lower Forest Gellideg Parish 5391 42 12 Garden Row 4
| Name | Position | Age | Where Born | Occupation | BK No |
| Lewis Williams | Head | 46 | Merthyr Tydfil, Glamorgan | Labourer at Iron works | 505 |
| Kezzia Williams | Wife | 43 | Merthyr Tydfil, Glamorgan | Labourer's wife | 506 |
| Margret Williams | Daur | 17 | Merthyr Tydfil, Glamorgan | Labourer in Coal Works | 549 |
| Kezzia Williams | Daur | 12 | Merthyr Tydfil, Glamorgan | 581 | |
| Mary Ann Williams | Daur | 8 | Merthyr Tydfil, Glamorgan | 582 | |
| John Williams | Son | 4 | Merthyr Tydfil, Glamorgan | 583 | |
| Elizabeth Williams | Daur | 2 | Merthyr Tydfil, Glamorgan | 584 |