In the 1911 Wales Census 21 Wood Street, Bargoed, Cardiff, Gelligaer, Glamorgan. Head William Thomas Davies, age 29, colliery weigher, worker, born Cardigan, Cardiganshire.
Wife Mary Ann Davies, age 32, married 5 years, 3 children born alive, all still living, born Bargoed, Glamorgan.
Son John Idris Llewellyn Davies, age 4, born Bargoed.
Daughter Gwyneth Lydia Mary Davies, age under 1 month, born Bargoed.
Son William Edmund Davies, age under 1 month, born Bargoed.
Father in law John Jones, age 60, colliery store keeper, worker, Mynyddislwyn, Monmouthshire.
Mother in law Mary Ann Jones, age 56, married 39 years, 10 children born alive, 8 still living, born Argoed, Monmouthshire.
Brother in law John Trevor Jones, age 18, single, butcher’s assistant, worker, born Bargoed.
Brother in law David Jones , age 16, single, colliery pumpsman, under ground, worker, born Bargoed.
Brother in law Benjamin Jones, age 14, colliery electrician, above ground, worker, born Bargoed.
Niece Lilian Mary Thomas, age 12, born Sirhowy, Monmouthshire.
The dwelling had 6 rooms.

1939 England and Wales Register
21 Wood Street, Gelligaer, Glamorganshire, Wales
1. William T. Davies, born December 30 1882, married, traffic wiegher (Colliery)
2. Mary A. Davies, born February 24 1879, married, unpaid domestic duties
3. Lydia M. Davies, born March 15 1911, single, assistant school teacher
4. Mary A. Jones, born June 23, 1854, widow, unpaid domestic duties