"GWENDDWR, a parish in the hundred of Talgarth, county Brecon, 5 miles S. of Builth. It is situated near the river Wye. The living is a perpetual curacy in the diocese of St. David's, value £125. The church is dedicated to St. Dubricius."
"TRAWSCOED, a hamlet in the parish of Gwenddwr, hundred of Talgarth, county Brecon, 8 miles N.W. of Talgarth."
Detailed information on deposited registers and transcripts for this parish is given under Breconshire Parish Registers on the Powys Archives website
As a guide only, the principal extant parochial church records for this parish span the dates shown below (as detailed in Parish Registers of Wales, NLW 2000) but exact current holdings should be confirmed with the individual Archives.
Baptisms 1752-1753, 1798-1990; Marriages 1766-1801, 1812-1971; Burials 1752-1753, 1798-1992 Parish Registers, or copies, for all or part of these dates are held at the NLW and/or Powys Archives. Bishops Transcripts for various periods are held at the NLW.
Family Search have an interactive map called "England and Wales Jurisdictions 1851" showing parish (and other) boundaries with optional background maps such as Ordnance Survey. There is also a Search facility, do read the guidance notes to get maximum benefit from this useful resource. See here for further background information to assist in the interpretation of this data
You can see pictures of Gwenddwr which are provided by:
Plan of the parish of Gwenddwr in the County of Brecon. 1841. William Jones, Belle Vue Place, Brecon, valuer and surveyor. Second class map based on old surveys. Voluntary agreement. Commutation dated 17.11.1840. Map shows enclosed lands only with houses, woods, plantations and orchards. Apportionment omits a few field names. 8,262 acres commuted. Apportionment by holding. Land use details and field-names given in apportionment schedule. Tithe rent charge £309.10.0d (£148.10.0d Arthur MacNamara, Llangoed, Brecs; £161 Gwenddwr Charity).
You can see maps centred on OS grid reference SO064433 (Lat/Lon: 52.080117, -3.367271), Gwenddwr which are provided by: