Name
- Pattillo, John1
- Payne, Ralph, 1st Baron Lavington1
- Paynes, Francis1
- Peacock and Co, the ' City of London ' Tavern1
- Peacocke, Warren Marmaduke, Major-General1
- Pearsall, John, self-styled Sir John Peshall, Baronet1
- Peel, Robert, 1st Baronet1
- Penn, John, MP for Helston; Governor of Portland1
- Pennant, Richard, Baron Penrhyn1
- Penrose, John, Reverend; of Corpus Christi College, Oxford1
- Percy, Hugh, 3rd Duke of Northumberland, politician and landowner, 1785-18471
- Percy, Hugh, formerly Smithson 2nd Duke of Northumberland1
- Perry, Thomas, of Chadlington, county Oxfordshire1
- Pictet de Rochemont, Charles, Minister from Geneva to the Allied Powers1
- Pitt, Charles, of Add MS 382711
- Pitt, George, 1st Baron Rivers of Stratfieldsaye 17761
- Pitt, John, of Gloucester; of Add MS 382131
- Planta, Joseph, the younger, GCH, diplomatist and politician, 1787-18471
- Platel, Henry, of the Tax Office1
- Plescy, Hugh1