Family of David John Bowen Mary Bowen Wales UK

DAVID JOHN BOWEN was born in 1845, in Llandeyen, Carmarthenshire, Wales. He was recorded in the 1891 census (source 1.), aged about 46, in Penybrynian Road, Llanguick, Glamorgan, Wales. In 1905, aged about 60, he was a Coal miner. (Source 2.). David is no longer living, time of death unknown

MARY BOWEN [EVANS?] was born in 1853, in Llanfynydd, Carmarthenshire, Wales. Parents unknown, but I beleive her maiden name is Evans. She was recorded in the 1891 census (source 1.), aged about 38, in Llanguick, Glamorgan, Wales. Mary is no longer living, time of death unknown.

It's unknown when David John Bowen married Mary Bowen [Evans?]. Both spoke Welsh (source 1.). They had six children (source 1.):
D. John Bowen in 1873
Elizabeth Bowen in 1874
Thomas Bowen in 1880
Catherine Bowen in 1884
Margaret Bowen about 1886
Jennet Bowen in 1888

More information about this family is wanted.

Sources:
1.) "1891 Wales Census - David Bowen (head)"
2.) "Certified copy of marriage Thomas Pritchard and Margaret Bowen"