« Reply #1 on: Sunday 08 October 06 00:20 BST (UK) »
the only Sophia I can see in Glam in 1851 born Pontypool is Sophia Palmer. Is this the one you're looking for? If so, she marries june qtr 1855 Neath 11a pg 645 either William Johns or John Williams - would you believe it?
I can find a Sophia Johns but not a Sophia Williams and as the other female on the page is called Mary, I think you'd need a cert or parish records to be sure.
1861 Wernceirch(?) Lodge. Blaenhonddau, Cadoxton juxta Neath RG9/4092 folio 105 pg 5
William Johns head mar 27 railway clerk b. Llangyfelach
Sophia wife 28 b. Monmouthshire, Pontypool
Thomas nephew 4 b. Glam, Pontypridd
1871 21a Pembroke Rd, Aberdare RG10/5407 folio 13 pg 19
William Johns head mar 37 curate of Aberdare b. Morriston
Sophia wife mar 38 b. Pontypool
Katie S dau 13 b. Glam, Neath
Thomas brother mar curate of Henllangoed(?) b. Glam, Morriston
it's the best match I can see so far. Morriston was certainly part of the parish of Llangyfelach according to Genuki. Slight career change, possibly influenced by the brother. Sophia might have 'lost' a couple of years when she married a younger man. Can't see them in 1881.
Cornwall: Allen, Bevan, Bosisto, Carnpezzack, Donithorn, Huddy, James, Retallack, Russell, Vincent, Yeoman
Cards: Thomas (Llanbadarn Fawr)
Glam: Bowler, Cram, Galloway, James, Thomas, Watkins
Lincs: Coupland, Cram
Mon: Cram, Gwyn, John, Philpot, Smart, Watkins
Pembs: Edwards (St. Dogmael's)
Yorks: Airey, Bowler, Elliott, Hare, Hewitt, Kellett, Kemp, Stephenson, Tebb