Name
- Oliver, Isaac, miniature painter1
- Osborne, Thomas, 1st Duke of Leeds, 1632-17121
- Palmer, Laura, wife of Roundell 1st Earl of Selborne1
- Palmer, Roundell, 1st Baron and 1st Earl of Selborne, Lord Chancellor1
- Palmer, William Waldegrave, 2nd Earl of Selborne, politician, 1859-19421
- Parnell, Charles Stewart, MP1
- Pearce, W1
- Pearce, William, correspondent of Emma Hamilton and John Bowyer Nichols, fl 1811-18251
- Peel, Arthur Wellesley, 1st Viscount Peel1
- Peel, Robert, 2nd Baronet, Prime Minister, 1788-18501
- Peel, Robert, 3rd Baronet1
- Pelham-Clinton, Henry Pelham, 5th Duke of Newcastle1
- Pepys, Samuel, diarist1
- Perceval, Spencer, Prime Minister of the United Kingdom, 1762-18121
- Percy, Alan Ian, 8th Duke of Northumberland1
- Petty, William, 2nd Earl of Shelburne, 1st Marquess of Lansdowne, formerly Fitzmaurice, 1737-18051
- Petty, William, political economist1
- Petty-Fitzmaurice, Edmond George, alias Lord Edmond Fitzmaurice, Baron Fitzmaurice, politician and historian, 1846-19351
- Phillimore, Walter George Frank, 1st Baron Phillimore1
- Phipps, Henry, 1st Earl of Mulgrave1