Name
- Pigonati, Andrea, engineer1
- Piranesi, Giovanni Battista, Italian artist1
- Pius VI, Pope1
- Porten, Stanier, Under Sec of State, Knight 17721
- Preston, William, Reverend; Chargé d'Affaires at Naples1
- Pringle, John, Baronet, Physician to George III1
- Ragland, Samuel, banker1
- Ram, Ignazio, of Rome1
- Raymondi, Giovanni Battista, British Vice-Consul at Syracuse1
- Richie, Robert, Consul at Venice1
- Roberts, Henry, of Add MS 420811
- Ross and Ogilvie, bankers1
- Ross, Alexander, Colonel; General 18121
- Ross, George, banker1
- Royal Observatory, Greenwich1
- Royal Society, 1660-1
- Russell, Richard, of Kenilworth; agriculturist1
- Rutter, Angelo, British Consul in Malta1
- Rutter, John, of Liverpool1
- Sackville, John Frederick, 3rd Duke of Dorset, diplomat and politician, 1745-17991