In the 1901 Census there is a Charles W Simmonds born in Tewkesbury in 1872 (he is a photographer).
His wife is Elizabeth (born Maesteg in 1872). Presumably the Elizabeth Griffiths who married a Charles William Simmonds in 1894.
The children are: William J born 1896 in Penygraig; Eveline born 1897 in Nantymoel; Elizabeth A born 1899 in Tonypandy and Charles A born 1900 in Penygraig.
Hopefull this will set you off in the right direction.
pgr30