Name
- Cockburn, George, 8th Baronet, naval officer, 1772-18531
- Colclough, Caesar, British resident in Switzerland1
- Cole, Henry William, Polish agent in Hamburg (?)1
- Commandaire St Geniès, Caesar Louis, French royalist1
- Conzié, Louis François Marc Hilaire, Comte, Bishop of Arras1
- Cragnez, Francis, Vice-Consul at Fiume1
- Craufurd, James, diplomatist1
- Crosbie, William, Major-General1
- Cumberland, Ernest Augustus, Duke of, son of George V of Hanover1
- Cuthbert, James Ramsey, MP1
- Damian, correspondent of Sir Arthur Paget, fl 18011
- Degen, Frederic, diplomat, fl 1800-18061
- Dimsdale and Clay, bankers? London1
- Drake, Francis, diplomat, 1764-18211
- Dundas, William, barrister and politician, 1762-18451
- Durno, James, Knight, diplomat, 1751-18071
- Elphinstone, George Keith, Admiral Viscount Keith1
- Esterházy, Count1
- Esterházy, Nicholas?, Prince of Galántha1
- Falcon, John, Consul-General at Algiers, fl 1800-18041