Name
- Percy, Hugh, formerly Smithson 1st Duke of Northumberland1
- Percy, Hugh, formerly Smithson 2nd Duke of Northumberland1
- Perregaux, Frederic1
- Perry, James, of Add MS 200821
- Peter the Great, Emperor of Russia1
- Philippe, George1
- Philipps, Fabian, of Add MS 280531
- Philipps, Fabian, of Add MS 280791
- Phipps, K-, Mrs1
- Pight, R-1
- Pitt, George, Baron Rivers1
- Pitt, Thomas, 2nd Baron Camelford1
- Pleasaunce, H-1
- Plushing Society1
- Porter, William, Russia Merchant1
- Potemkin, Grigory Aleksandrovich, Prince, Russian statesman1
- Pratt, Charles, 1st Earl Camden1
- Price, Bridgett1
- Puibusque, Marquis de1
- Pursill, Edward, Mayor of Buckingham1