Mary Jane Griffiths 
Born: 1895 in Abercanaid, Glamorgan, Wales (Q2 1895 MT 11a 690)Mary Jane's Heritage
Parents: Hugh Morgan Griffiths, Bessie Walters
Siblings: Elizabeth Griffiths, Florrie Griffiths, David W Griffiths, James E Griffiths, Violet R Griffiths
1911 Census 27 Nightingale Street, Abercanaid, Merthyr Tydfil
| Name | Position | Age | Where Born | Occupation | BK No |
| Hugh M Griffiths | Head | 45 | Abercanaid, Glamorgan | Collier Hewer | 381 |
| Bessie Griffiths | Wife | 43 | Llangerdock, Carmarthen | 377 | |
| Mary Jane Griffiths | Daur | 16 | Abercanaid, Glamorgan | At Home | 848 |
| Florrie Griffiths | Daur | 12 | Abercanaid, Glamorgan | School | 382 |
| David W Griffiths | Son | 10 | Abercanaid, Glamorgan | School | 850 |
| James E Griffiths | Son | 8 | Abercanaid, Glamorgan | School | 641 |
| Violet R Griffiths | Daur | 1 | Abercanaid, Glamorgan | 383 |
1901 Census 39 Gethin Street, Abercanaid, Merthyr Tydfil
| Name | Position | Age | Where Born | Occupation | BK No |
| Hugh M Griffiths | Head | 35 | Abercanaid, Glamorgan | Coal Hewer | 381 |
| Elizabeth Griffiths | Wife | 33 | Llangadock, Carmarthen | 377 | |
| Elizabeth Griffiths | Daur | 11 | Abercanaid, Glamorgan | ||
| Mary Jane Griffiths | Daur | 6 | Abercanaid, Glamorgan | 848 | |
| Florrie Griffiths | Daur | 2 | Abercanaid, Glamorgan | 382 | |
| David W Griffiths | Son | 0 | Abercanaid, Glamorgan | 850 | |
| James E Griffiths | Son | 8 | Abercanaid, Glamorgan | 641 |