« Reply #49 on: Wednesday 10 September 14 17:32 BST (UK) »
this looks to be the family for the first birth
1881 20 Seymour Street, Mountain Ash, Llanwonno RG11/5295 folio 25 pg 43
William Williams head mar 31 coal miner b. Breconshire, Ystradgerlais
Elizabeth wife 36 b. Carmarthenshire
John son 9 b. Ystradgerlais
Maria dau 6 b. Glamorganshire, Cwmtwrch
Gwylim son 5 b. Glamorganshire, Mountain Ash
The Breconshire place name should be Ystradgynlais, but census shows Ystradgerlais.
This Daniel is on the 1901 census with his parents at RG13/5006 folio 90 pg 33, so not your Daniel.
Is there a street address given for the birth of Isaac & I'll have a look for that family? USD is Urban Sanitary District.
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