| O'Hara, T (1820) | 33 Suffolk St, Charing Cross, London | upholder |
| O'Hara, Thomas (1825) | 20 Gravel Lane, Manchester | chairmaker |
| O'Hara, Thomas (1837) | 95–96 Richmond Row, Liverpool | tailor, draper and upholder |
| O'Neal, Francis (1804) | Liverpool | upholder |
| O'Neil & Smith (1793) | White St, Southwark, London | japanned chairmakers |
| O'Neill, Charles (1821) | 4 Eldon St, Liverpool | cabinet maker |
| O'Neill, James & Alan Francis (1812-27) | 3 Cable St, Liverpool | upholder feather merchants and paper hangers |
| O'Neill, Jane & Co (1827-39) | Cable St, Liverpool | upholder and feather merchant |
| O'Neill, John (1753-1787) | Lancaster | cabinet maker and carver |
| O'Neill, John (1816-39) | Liverpool | cabinet maker |
| O'Neill, Mary (1835) | 23 Chatham St, Liverpool | upholder |
| o, John (1669) | Chapel Branston, Northamptonshire | |
| Oades, Henry (1750) | Blackwater, Hampshire | joiner |
| Oades, Thomas (1735) | Isleworth, Middlesex | joiner |
| Oagle, William (1654) | | |
| Oakden, Amos & Sons (1890-1940) | 86-90 Curtain Road, London | cabinet ironmongers |
| Oake, Richard (1707) | West Lavington, Wiltshire | |
| Oake, Robert (1668) | London | |
| Oake, Robert (1713) | Salisbury, Wiltshire | |
| Oakely, John (1692) | Walkin, Hertfordshire | |
| Oaker Mary (1726/7) | St George the Martyr, Mdx | |
| Oaker, William (1778-85) | 3 Hart St, Covent Gdn, London | carver |
| Oakes, Richard (1775-79) | 86 Snow Hill, Holborn Bridge, London | case and cabinet maker |
| Oakes, Robert (1691) | Ingleston, Essex | |
| Oakes, Samuel (1726) | St Giles Cripplegate, London | joiner |