Found the man in question:
1. He didn't have a second initial 'W' - was born plain Charles Jeynes, Jun.qtr.1864 Westbury on Severn, mmn Roberts. He was actually born in East Dean, son of Thomas and Jane (nee Roberts). Apart from birth entry everything else regarding family name is as Jaynes.
2. Charles Jaynes married Charlotte Gainey, widow, dau. of Henry Merriman on 18/10/1885 Drybrook.
3. They were in Eglwysilan (Pontypridd) by 1891.
4. He died as Charles Jaynes in 1931 Pontypridd.
Annette