Name
- Coxe, Thomas, of Add MS 351291
- Culley, George, of Add MS 351291
- Curtis, Roger, Baronet, Admiral1
- Curwen, John Christian, of Workington Hall; politician1
- D'Arcy, Robert, 4th Earl of Holdernesse, diplomat and politician, 1718-17781
- Dalrymple, John, 4th Baronet of Cousland, formerly Dalrymple; lawyer and historian, 1726-18101
- Danby, William, correspondent of Arthur Young, fl 1769-17711
- Darell, H, correspondent of Arthur Young, fl 17981
- Davers, C-1
- Davy, Humphry, 1st Baronet, of Grosvenor Street, natural philosopher, 1778-18291
- Dewhirst, Charles, correspondent of Arthur Young, fl 18091
- Dillon, John Talbot, 1st Baronet, politician, c 1740-18051
- Dillon, William Henry, Knight, naval officer, 1779-18571
- Dirom, Alexander, correspondent of Arthur Young, fl 18041
- Domett, John, correspondent of Arthur Young, fl 18071
- Dore, James, correspondent of Arthur Young, fl 18071
- Douglas, Sylvester, 1st Baron Glenbervie, lawyer, politician and diarist, 1743-18231
- Douglas, Thomas, 5th Earl of Selkirk, landowner and colonist, 1771-18201
- Duff, James, 2nd Earl Fife, landowner, 1729-18091
- Dumont, -, correspondent of Arthur Young, fl 18011