Name
- Charlton, William Johnston, Major-General Army Medical Staff1
- Clarke, Arthur Calvert, Vice-Admiral1
- Collen, Edwin Henry Hayter, Knight, army officer, 1843-19111
- Congreve, Walter Norris, Knight, army officer, 1862-19271
- Cranston, Robert, Brigadier-General KCVO1
- Cuffe, Hamilton John Agmondesham, 5th Earl of Desart, barrister, 1848-19341
- Cuming, Williams, of the Admiralty1
- Cunard Co, shipowners, of Liverpool1
- Dallas, Alister Grant, army officer, 1866-19311
- Dallas, James, army officer, fl 1901-19021
- David Clark and Sons, brush manufacturers, of Walsall1
- Dawson, Arthur Trevor, 1st Baronet, naval officer and armaments manufacturer, 1866-19311
- Denay, John MacAusland, politician, fl 19031
- Denny, Archibald, 1st Baronet, engineer, businessman and shipbuilder, 1860-19361
- Doran, George Augustus, High Sheriff of Belfast, 1848-19341
- Dowding, William Berkeley, clergyman and army chaplain, 1858-19251
- Duff, Beauchamp, Knight, army officer, 1855-19181
- Duke, Henry Edward, 1st Baron Merrivale, judge and politician, 1855-19391
- Dumbleton, Horatio Norris, army officer and military engineer, 1858-19351
- Dunne, Walter Alphonsus, army officer, 1853-19081