Duke DKU
- Duke Duweno DKUD
- Duke Henry DKUH
- Duke of Beaufort DOB
- Duke of Bedford DOB
- Duke of Clarence DOC
- Duke of Cumberland DOC
- Duke of Dixie DOD
- Duke Of Earl DOE
- Duke of Fife DOF
- Duke of Gordon DOG
- Duke of Richmond DOR
- Duke of Rothesay DOR
- Duke of Sussex DOS
- Duke of Wellington DOW
- Duke Of Windsor DOW
- Duke of York DOY
- Duke Rees DKUR