| Grooms Surname | Grooms Forname | Grooms Parish | Brides Forname | Brides Surname | Brides Parish | Marriage Parish | B/L | Date |
|---|---|---|---|---|---|---|---|---|
| O`Leary | Bartholomew Henry | St Woolas,Npt. | Anna Maria Gedge | Harvey | St Woolas,Npt. | St Woolas,Npt. | B | 22/06/1800 |
| Oak | Richard | Llandogo | Elizabeth | Cunn | Llandogo | Llandogo | B | 15/04/1776 |
| Oak | William | Llanbaddock | Diana | Giles | Llanbaddock | Llanbaddock | B | 03/05/1807 |
| Oaks | John | Llandogo | Hannah | Reynolds | Llandogo | Llandogo | B | 29/07/1778 |
| Oaks | William | Llanbaddock | Mary | Edwards | Llanbaddock | Llanbaddock | B | 23/10/1810 |
| Oldham | George | St Nicholas,Bristol. | Martha | Watkins | St Arvans | St Arvans | L | 11/08/1812 |
| Oliphant | Francis | Abergavenny | Sarah | Watkins | Abergavenny | Abergavenny | L | 17/07/1791 |
| Oliver | James | Tregare | Elizabeth | Prichard | Penrhos | Penrhos | B | 15/05/1727 |
| Orchard | Joseph White | Poole,Dor. | Mary Ann | Pulling | St Arvans | St Arvans | L | 08/09/1807 |
| Ore | William | Monmouth | Mary | George | Welsh Bicknor,Hef. | Monmouth | L | 31/07/1765 |
| Osborne | Joseph | Monmouth | Elizabeth | Tudor | Monmouth | Monmouth | B | 14/10/1764 |
| Osborne | Lewis | Abergavenny | Anne | Blashfield | Abergavenny | Abergavenny | L | 19/12/1808 |
| Osborne | Lewis | Abergavenny | Sarah | Wallington | Abergavenny | Abergavenny | L | 28/11/1805 |
| Osborne | William | Llandenny | Elizabeth | Munday | Llandenny | Llandenny | B | 08/07/1771 |
| Osland | John | Abergavenny | Martha | Jones | Abergavenny | Abergavenny | B | 19/06/1796 |
| Osland | Richard | Abergavenny | Elizabeth | Lewis | Abergavenny | Abergavenny | L | 13/09/1802 |
| Osland | William | Abergavenny | Ann | Savigare | Abergavenny | Abergavenny | B | 21/04/1776 |
| Osland | William | Abergavenny | Mary | Thomas | Abergavenny | Abergavenny | B | 06/10/1803 |
| Owen | Adam | Llantilio Pertholey | Elizabeth | Bigham | Llantilio Pertholey | Llantilio Pertholey | 22/05/1743 | |
| Owen | David | Bassaleg | Margaret | Jones | Bassaleg | Bassaleg | B | 12/01/1811 |
| Owen | John | Merthyr Tydfil,Glam. | Elizabeth | Edmond | Bedwellty | Bedwellty | 03/11/1753 | |
| Owen | John | Llantilio Pertholey | Mary | Jones | Llantilio Pertholey | Llantilio Pertholey | L | 04/01/1769 |
| Owen | Samuel | Llantilio Pertholey | Margaret | Blethin | Llantilio Pertholey | Llantilio Pertholey | B | 20/06/1772 |
| Owen | William | Llanvair Discoed | Elizabeth | Bigam | Llanvair Discoed | Llanvair Discoed | 26/10/1741 | |
| Owens | Hugh | Tintern | Anne | Howell | Chapel Hill | Tintern | B | 06/12/1756 |
| Owens | John | Holywell,Flintshire. | Mary | Ainser? | Monmouth | Monmouth | L | 29/09/1803 |
| Owens | John | St Woolas,Npt. | Mary | George | St Woolas,Npt. | St Woolas,Npt. | B | 06/12/1806 |
| Owens | Robert | Bedwellty | Margaret | Davies | Bedwellty | Bedwellty | B | 11/02/1804 |