Name
- O'Malley, Samuel, 1st Baronet1
- O'Neill, Francis John, corn merchant, of Limerick1
- Owen, Richard, of Manchester1
- Pace, William, Reverend; Secretary, Philanthropic Society in St. George's Fields, London1
- Pakington, John Somerset, 1st Baronet, 1st Baron Hampton1
- Pasley, Robert, cabinet-maker, of Dublin1
- Pater, Joseph, of Liverpool1
- Pawson, William, Mayor of Leeds1
- Peel, Robert, 2nd Baronet, Prime Minister, 1788-18501
- Philanthropic Society, London1
- Playfair, Lyon, 1st Baron Playfair, politician and chemist, 1818-18981
- Plunket, William Conyngham, 1st Baron Plunket, Lord Chancellor of Ireland1
- Privy Council, The1
- Protestant Operative Association, Dublin1
- Protestant Orphan Society, Dublin1
- Pyne, James Baker, artist, d 18701
- Randolph, Herbert, Vicar of Marcham1
- Rawson, Thomas James, Collector of Excise at Naas1
- Rees, Thomas, LLD; Unitarian minister1
- Reid, John, plush manufacturer, Of London1