Name
- Cassan, Stephen Sheffield, of Sheffield, Queen's Co1
- Clarke, Edward, calico-printer, of Dublin1
- Cockburn, Mary, Miss1
- Collis, Edward, Irish Yeomanry Brigade-Major1
- Colthurst, Nicholas Conway, 4th Baronet, MP for Cork1
- Condorcet O'Connor, Arthur, formerly O'Connor; United Irishman1
- Conyngham, Henry, 1st Marquess Conyngham1
- Coote, Charles, 1st Earl of Mountrath1
- Corneille, Daniel, Captain; engineer to Directors General of Inland Navigation, Ireland1
- Corry, William Isaac, Port Surveyor at Newry1
- Cotter, James Laurence, 3rd Baronet 18291
- Crosbie, Marcus, of Add MS 402371
- Cruise, George Russell1
- Cuthbert, John1
- D'Alton, Michael, of Ross Castle, Six-Mile-Bridge, county Clare1
- Dalton, George Forster, lawyer, fl 1812-18301
- Darby, Christopher, army officer, 1758-18321
- Dawson, Walter, correspondent of Sir Robert Peel, fl 18141
- Domvile, Compton Pocklington, 1st Baronet, politician, c 1775-18571
- Downes, John, of Loughrea, customs officer, fl 1791-18131