Name
- Orchowski1
- Otto, of Add MS 351281
- Owen, John, of Add MS 351301
- Palmer, Charles Fyshe1
- Panton, William1
- Parquot, P- D-1
- Parry, Caleb Hillier, MD1
- Parsons, Joseph1
- Paterson, John, of Add MS 351291
- Pearson, John, Surgeon1
- Pelham, Thomas, Baron Pelham, 2nd Earl of Chichester1
- Pennant, Thomas, FRS, naturalist1
- Percy, Hugh, formerly Smithson 1st Duke of Northumberland1
- Perlet1
- Petty, William, 2nd Earl of Shelburne, 1st Marquess of Lansdowne, formerly Fitzmaurice, 1737-18051
- Pichon, of Add MS 351281
- Pictet, Mare Auguste, Professor of Philosophy at Geneva1
- Pinckney, Thomas1
- Pitt, William, Prime Minister, called 'the younger', 1759-18061
- Pitt, William, of Wolverhampton1