« Reply #5 on: Wednesday 12 December 12 17:29 GMT (UK) »
I've been trying the free search on the 1911 to get some details on John. Working from age given in index, is this a possible from 1901?
93 Bute St, Treherbert RG13/5012 folio 109 pg 22
Thomas Jones head mar 47 colliery timberman underground b. Cardiganshire, Tregaron
Jane wife 48 b. Tregaron
William Evans lodger widower 36 colliery timberman underground b. Pembrokeshire, Brawdy
John Evans lodger's son 15 coal hewer b. Pembs, St Davids
Thomas Evans lodger single 24 colliery timberman underground b. Pembs, St Davids
David Davies lodger mar 49 colliery timberman underground b. Carmarthenshire, Cenarth

You really need the 1906 marriage cert to be sure
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