Name
- Popham, Home Riggs, Admiral1
- Popham, William, Major-General1
- Porto-Carrero Conde de Montijo1
- Porto-Carrero, Maria Francisca, Condesa de Montijo1
- Powell, Thomas, Major; Inspector-General of Police, Leinster1
- Prendergast, Michael George, MP1
- Prior, Thomas, Reverend; afterwards Regius Professor of Greek at Trinity College, Dublin1
- Pritte, Francis Aldborough, son of Henry, 1st Baron Dunalley1
- Périgord, Charles Maurice de Talleyrand-, Prince of Benevento, 1754-18381
- Pérusse, Louis-François-Marie, Comte des Cars, army officer, 1737-18141
- Ramsay, Elizabeth, widow of George, 8th Earl of Dalhouise1
- Ramsay, Robert, Lieutenant; RN1
- Regnier, Jacques1
- Rehausen, Baron de, Swedish Minister in London1
- Rennell, Thomas, Reverend1
- Richards, Bartholomew Vigors1
- Ricketts, Thomas Bourke, of Add MS 372951
- Roberts, John, Director of the East India Company1
- Robertson, James, of Add MS 372881
- Robinson, G-1