Name
- Cadogan, Charles, 2nd Baron Cadogan, army officer and politician, 1685-17761
- Cadogan, William, 1st Earl Cadogan, army officer and diplomat, 1671-17261
- Callenberg, Gerard, Admiral1
- Campbell, John, Lord Glenorchy, 3rd Earl of Breadalbane (1752)1
- Cardel, Madame1
- Carpentre1
- Cassart, Jean1
- Casteele, J- B-, Lieutenant1
- Castelyn, Antoni1
- Charles Emanuel I, of Sardinia1
- Charles VI, Holy Roman Emperor1
- Charles VII, Emperor of Germany1
- Childe, J, correspondent of Lord Portland, fl 16931
- Clarke, Gedney, junior1
- Clarke, Gedney, senior1
- Coke, Thomas, Baron Lovell, 4th Earl of Leicester, 1880-19491
- Colloredo, Rudolf Joseph, Count, Imperial Vice-Chancellor1
- Colt, William Dutton, diplomatist1
- Cornett, Jean Philippe1
- Cresset, James, Secretary to the Princess of Wales, and Treasurer to the Prince of Wales1