Name
- Compeer, Stephen?1
- Compton, Spencer Joshua Alwyne, 2nd Marquess of Northampton1
- Cooke, Edward, Under-Secretary of State, 1755-18221
- Cooke, William, of Lincoln's Inn1
- Cope, Arabella Diana, wife (1790) of John Frederick Sackville, 3rd Duke of Dorset, and (1801) of Charles Whitworth, Baron Whitworth1
- Cope, Jonathan, 1st Baronet, of Brewerne1
- Cornwall, Charles Wolfram, Speaker of the House of Commons1
- Cornwallis, Caroline, wife of F Cornwallis Archbishop of Canterbury1
- Cornwallis, Charles, 1st Marquess Cornwallis, army officer and politician, 1738-18051
- Cotteen, John, Pass-master of Castletown1
- Cottrell, Stephen, Clerk to the Council1
- Coutts and Co, bankers, 1692-1
- Crane, Penelope1
- Craufurd, Charles Gregan, Knight, army officer and politician, 1761-18211
- Craufurd, James, 2nd Baronet, né Craufurd, landowner, 1761-18391
- Craven, Richard Keppel, Chamberlain to Qu Caroline1
- Crewe, Arthur, of Hawkesbury1
- Crispe, John, of Add MS 385791
- Crokat Brothers, Leghorn1
- Curran, John Philpot, MP, Master of the Rolls in Ireland1