« Reply #12 on: Tuesday 24 July 12 12:28 BST (UK) »
well, thankfully, I've just spotted John in 1861 and he
is a grandson
Tynllechau Isha, Cadoxton juxta Neath RG9/4093 folio 6 pg 5
Ann Jones head widow 66 retired farmer
Margret dau 25
Ebenezer son 20 moulder
John Jones grandson 19 furnaceman in works
all born Cadoxton
Ebenezer's name is hard to mark out and he was the one I'd been searching for as it's a more unusual name. Looks like it begins with a g, but if you look at the Elizabeth in the next household, you can see that the enumerator wrote his es like that. Ebenezer is still at Tynllecha 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