Name
- Conyngham, Henry, 1st Marquess Conyngham1
- Cooke, Edward, Under-Secretary of State, 1755-18221
- Cooper, Edward Synge, MP1
- Coote, Charles Henry, 2nd Baron Castle Coote1
- Costigan, John, distiller, of Dublin1
- Courcy, Patrick, correspondent of Henry Arthur Herbert, fl 18121
- Crofton, James, Chief Clerk to Irish Treasury1
- Crosbie, John, Viscount Crosbie, 2nd Earl of Glandore (1781)1
- Curtis, William, 1st Baronet, banker and politician, 1752-18291
- Dabbadie, Michael, Chairman of Irish Royal Canal Co.'s creditors1
- Dallas, George, 1st Baronet, political writer, 1758-18331
- Dickenson, William, correspondent of Sir Robert Peel, fl 18121
- Digby, Martin, correspondent of Sir Robert Peel, fl 18121
- Dolphin, Hubert Thomas, of Loughrea, barrister and correspondent of Sir Robert Peel, fl 1812-18241
- Dundas, Robert, 2nd Viscount Melville, formerly Dundas, politician and statesman, 1771-18511
- FitzGerald, Edward Villiers, army officer, fl 1812-18141
- Fitzgibbon, John, 2nd Earl of Clare, army officer and privy counsellor, 1792-18511
- Foster, John, Chancellor of the Exchequer in Ireland, Speaker of the Irish House of Commons, and Baron Oriel1
- Galloway, John, secretary to the Commission for Relief of the Trade and Manufactures of Ireland, fl 1813-18211
- Goulburn, Henry, politician, 1784-18561