Hello again

To summarise latest position, you are looking for Benjamin Thomas, born 2nd April 1854, at St Clears, Llanddowror, or Red Roses. On Benjamin's marriage certificate, his Father was named as John Thomas, a Tailor.
Think I've found them in 1871.

Narberth Road, Castle Dyrran, Carmarthenshire
John Thomas Head age 52 Taylor born Mynachlogddu, Pembs
Elizabeth Thomas Wife age 50 born Dale, Pembs
Benjamin Thomas Son age 16 Mailcart Driver born West Roses, Carms
Thomas H Thomas Son age 12 Scholar born Narberth Road, Carms
Ann M Thomas Dau age 4 born Narberth Road, Carms
RG10 Piece 5508 Folio 3 Page 6
Modified: West Rose was in Eglwys Cymin Parish, and is between Red Roses and Tavernspite. I think the 1861 is incomplete for Castle Dyrran.
Kindest Regards
Morgan