Name
- Clark, William Donaldson, journalist, international civil servant2
- Clayden, William, technician Inoculation Department St Mary's Hospital2
- Clegg, Hugh Anthony, journal editor2
- Cleland, Jean, of Darvel Ayr2
- Clemenger, Francis S, assistant in the Inoculation Department St Mary's Hospital2
- Clemens, Cyril Coniston, President International Mark Twain Society, 1902-19992
- Cook, Robert Percival, biochemist2
- Cope, Zachary Vincent, Hunterian Professor Royal College of Surgeons2
- Cortzen, Ernest Wilhelm, CEO of the Luxembourg Bank2
- Craig, Howard Reid, Director New York Academy of Medicine2
- Craigie, James, President Society of American Bacteriologists, Director Imperial Cancer Research Fund2
- Danby, W D H, correspondent of Sir Alexander Fleming, fl 1946-19472
- Davis, Maud B, wife of Richard Davis, fl 19562
- Day, H B, friend of Alexander Fleming, fl 1918-19552
- Detrez, Lucien, historian, poet and clergyman, 1885-19562
- Dooley, Denis, of Croydon, correspondent of Alexander Fleming, fl 1947-19512
- Dunnett, Hamilton D F, of Inveravon, clergyman, fl 1902-19562
- Dyson, Charles Bertram, physician and researcher, 1889-19722
- E C Clarke and Co, solicitors2
- Edwards, Geoffrey R, Sec Royal Society of Medicine2