| OATES Abraham | Susan | ca1831 | Chacewater? |
| OATES George | STOKES Eliza | 19/3/1837 | Truro |
| OATES George [Kea] | TREZISE Elizabeth | 21/8'1802 | Kenwyn |
| OATES John | HICKS Mary | 1878 | Kea |
| OATES John | IVEY Jane | 1833 | Camborne |
| OATES Philip | FAULL Mary Ann | 23/8/1866 | Kenwyn |
| OATES Richard | FAULL Emily Grace | 1869 | Truro |
| OATES Richard | FAULL Emily Grace | 1868 | Kea Reg Office |
| OATES Thomas | DAVEY Mary | 1/1832 | St Just |
| OATES Thomas [m2] | JAMES Elizabeth [m2][nee REMFRY] | 29/8/1866 | Chacewater |
| OATES William | EDWARDS Susan Ann | 1856 | Truro |
| OATES William | PRIDEAUX Christian | 1822 | Camborne |
| OATES William | OATES Ann | 25 /7/ 1874 | St Erme |
| OATES(OATS) Azariah Richards | VIOL Jennifer | 1831 | Camborne |
| OATEY James | CHRISTOW Mary | 4/6/1826 | Phillack |
| OATEY James | POLKINGHORNE Eliza | 10/4/1835 | Phillack |
| OATEY Jerermah | DUNNING Philippa | 5/1/1834 | Phillack |
| OATEY William | WATTS Mary | 27/5/1817 | Phillack |
| OATFIELD Richard | CURNOW Ann | 1822 | Camborne |
| OATS Arthur | GONINAN Mary Jane | 4/12/1864 | Gwithian |
| OATS C | EXELBY | 21/2/.1837 | St Keverow |
| OATS James | MICHELL Ann | 14 /11/1824 | Phillack |
| OATS James | OATS Jane | 3/5/1832 | Kenwyyn |
| OATS John | CADDY, Jane | 1836 | St. Hillary |
| OATS Martin | GRENFELL Dorothy | ca1830 | MORCOM Margaret |
| OATS Philip | HOOPER Joanna | 19/5/1836 | Kenwyn |
| OATS Richard | JENKIN Elizabeth | 3/4/1832 | Phillack |
| OATS Richard | AYRES Frances | 9/9/1857 | St Just in Penwith |
| OATS William Henry | AYRES Martha | ||
| ODGERS John | WILLIAMS Grace | 1852 | Redruth |
| ODGERS William James | CHRISTOE Mary | 3/9/1866 | Charlestown, St Austell |
| ODGERS Edmund [Helston] | HOLLOCOMBE Jane [Mawgan] | 10180 | Mawgan at Menage |
| ODGERS Henry | JAMES Anne | 1826 | Camborne |
| ODGERS John | RAWLINS Charlotte of Gluvias | 1826 | Camborne |
| ODGERS John | WILLIAMS Elizabeth | 9/1/1832 | Phillack |
| ODGERS Josiah | BUZZA Ann | 6/7/1865 | |
| ODGERS Samuel | PRYER Zenobia | 14/2/1884 | Helston |
| ODGERS William | BENNETTS Catharine | 1829 | Camborne |
| ODGERS William | TREVILIAN Prudence | 1828 | Camborne |
| ODGERS William Henry | GRIBBLE Elizabeth Jane | 3/9/1861 | Chacewater, Kenwyn |
| ODGERSThomas | JENNINGS Elizabeth | 8/4/1848 | Gwithian |
| OGERS James | THOMAS Jane | 08/7/1813 | Mawgan at Menage |
| OGLE George [Brompton] | POPHAM Philippa Wallis [Falmouth] | 23/7/1836 | |
| OKE William | BUINE? Elizabeth | ca1842 | |
| OLD Edward | OLIVER Elizabeth | 20/2/1814 | Phillack |
| OLD Thomas Henry | GREGOR Annie Maria | Gulval | |
| OLIVE Joseph [m2] | COLWELL Mary | 11/9/1827 | St Austell |
| OLIVER Francis | NICHOLLS Eleanor [Madron] | 23/11/1820 | Mawgan at Menage |
| OLIVER George | HARVEY Mary | 26/12/1820 | Sennen |
| OLIVER Jacob | Caroline Jane GILBERT | 26 /10/ 1871 | Camborne |
| OLIVER James | WATERS Margaret | 21/1/1834 | Phillack |
| OLIVER James [Paul] | JOHNS Honor | 1 /3/ 1800 | Sancreed |
| OLIVER John | SIMONS Honour | 16/4/1820 | Phillack |
| OLIVER John | WILLIAMS Joanna | 1/6/1828 | St Austell |
| OLIVER Nicholas | BAKER Prudence | 27 /1/1828 | Phillack |
| OLIVER Richard Jose | STEVENS (STEPHENS) Jane Olivey 5 January1831 | Camborne | |
| OLIVER Richard Sidney [Falmouth] | CARDELL Amelia [ Newquay] | 13/4/1837 | St Columb Minor |
| OLIVER Thomas | LIDDICOAT Mary | 11/1/1826 | Phillack |
| OLIVER William | OATEY Joanna | 13/2/1831 | Phillack |
| OLIVEY Hugh Olver | Z Peggy | 25/1/1830 | Redruth |
| OLIVIER Richard | PENFOUND?Selina | 8/8/1836 | Liskeard |
| OLIVIER John | JAMES Mary Ann | 28/6/1836 | Sithney |
| OLIVIER John | JAMES Mary Ann [Helston] | 25/6/1836 | Sithney |
| OLVER James [Liskeard] | Z Admonituis [Torpoint] | ca1850 | |
| OLVER John - MEW - | SNELL Jane | 9/2/1823 | St Stephen in Brannel |
| OPIE | ARNALL | 1809 | Redruth |
| OPIE Edward | TRESIZE Johanna | 9/6/1806 | St Agnes |
| OPIE James | HELLENS Matilda | 22/12/1833 | Stithians |
| OPIE William | PENHALL Catharine | 24/11/1832 | St Austell |
| OPIE, William [m2] | HARRIS Martha | 24/1/1825 | Lostwithiel |
| OPPEY David | ROBERTS Jane | 28 /3/ 1838 | Wendron |
| OPPY Thomas | MOYLE Mary | 18 /8/ 1844 | Wendron |
| OPPY Francis | REED Oleviah | 1o/11/1832 | Wendron |
| OPPY Francis | REED Oleviah | 10/11/1832 | Wendron |
| OPPY Francis | REED Oleviah | 10/11/1832 | Wendron |
| OPPY John [m2] | KNUCKEY Avis [m 2] | 27 /3/. 1827 | Stithians |
| OPPY Michael , | KNUCKEY Mary | 29 /5/ 1843 | Stithians |
| OPPY Thomas | KNUCKEY Betsy | 21 /10/. 1826 | Stithians |
| OPPYJohn | SPARGO Grace | 9/9/1799 | Stithians |
| ORCHARD Edmund (Edward) | FAUL Chissey | 1816 | St Agnes |
| ORCHARD Hannibal [Mawnan ] | TREMAYNE Grace | 10/9/1808 | Constantine |
| ORCHARD Joseph [Gluvias] | ELLIS Mary | 16Sep1824 | Mawgan at Menage |
| ORCHARD Joseph [Crowan] | .ORCHARD Prudence | ,1812, | Mawgan at Menage |
| ORCHARD Nicholas | WYATT Elizabeth | 08/4/1828 | Mawgan at Menage |
| ORCHARD Philiip | ROWE Elizaveth Ann | 29/4/1871 | Redruth |
| ORCHARD Thomas | WILTON Betsy | 14/2/1830 | Marham |
| ORCHARD William [m3] | TAMBLYN Elizabeth Ann | ca 1869 | Port Isaac? |
| OROIT Joseph [m2] | PEARCE Jane | 1842 | St Agnes |
| OSBORN Charles | PERMMEWAN Jane | 25/6/1825 | Sennen |
| OSBORN Richard | ACTON Susanna | 1864 | Calstock |
| OSBORN Stephen [m2][Perranuthone | EDWARDS Anne | 7 /11/ 1801 | St Hilary |
| OSBORN Thomas | ROWE Mary | 1889 | Calstock |
| OSBORN William | SMALE Susan | 13/4/1842 | Gunnislake |
| OSBORNE Benjamin - | TONKING Ann | 1829 | St Stephen in Brannel |
| OSBORNE Henry | JENKIN Elizabeth | 3/5/1815 | Phillack |
| OSBORNE Richard | POLKINGHORNE Elizabeth | 28 /12/1824 | Phillack |
| OSBORNE Richard | SNELL Elizabeth | 1825 | St Stephen in Brannel |
| OSBORNE Richard - | HARRIS Ann | 1827 | St Stephen in Brannel |
| OSBORNE Thomas | MADDERN Pee M | ||
| OSBORNE Thomas | WILLIAMS Dorothy | 01 /2/ 1823 | St Columb Major |
| OUGH John | JOHNS Mary | 2/11/1800 | Landrake |
| OWEN William [W Essex Reg] | JORDAN Nelly | 21/3/1811 | Budock |
| OXMAN John Henry | GRANT Mart | 5/5/1887 | Herodfoot |
| OXNAM William Jnr | TREVILIAN Marianne | 1834 | Camborne |