Here are some entries from the 1813-1837 Marriage Index published by Gwent FHS
[available for purchase through their website] :
all DUFFIELD
Charles m. Elizabeth JONES both of Bedwellty, 10 October 1816 @ Bedwellty
Edward of Risca m. Elizabeth COSLET of St Woolos, 22 September 1834 @ St Woolos
Thomas m. Elinor PHILLIPS both of Christchurch, 10 January 1825 @ Christchurch
Thomas m. Ann JONES both of St Woolos, 21 May 1836 @ St Woolos
Ann [wid] m. Thomas TUCKER both of Dixton, 11 March 1831 @ Dixton
Anne m. George PHILLIPS both of Bedwellty, 14 March 1829 @ Bedwellty
Elizabeth m. Thomas ROSSER both of Bedwellty, 31 August 1835 @ Bedwellty
Jane m. Thomas ALLCOCK both of Aberystruth, 23 June 1821 @ Aberystruth
Margaret m. Thomas ALLEN both of Dixton, 6 October 1824 @ Dixton
Mary of Trevethin m. George ELY of Dudley Worcs, 1 June 1826 @ Trevethin
[by licence]
Pam
in New Zealand