- For other uses, see Duke.
Duke or duchess is a title of nobility.
A Preserver-seeded planet discovered in 2369 by the USS Enterprise was found to be in a feudal state, with towns ruled by dukes and grand dukes living in castles, though they acted more like warlords and sold people as property. (TNG novel: Here There Be Dragons)
- William Hanover, the Duke of Cumberland (TOS novel: Home Is the Hunter)
- Zevon, a Romulan duke (TNG - Double Helix novel: Red Sector)
- Alexander Leonfeld, son of the Fifth Duke of Leonfeld (ST - Day of Honor novel: Ancient Blood)
- John Murray, son of the Duke of Atholl (TOS novel: Home Is the Hunter)
- Roger Wells, a descendant of the Duke of Wellington (TNG - SA novella: Nova Command)
- TOS novel: The Galactic Whirlpool
- TOS novel: Home Is the Hunter
- TOS comic: "A World Gone Mad"
- TNG novel: Here There Be Dragons
- TNG - Double Helix novel: Red Sector
- TNG - SA novella: Nova Command
- ST - Vulcan's Soul novel: Exodus
- ST - Day of Honor novel: Ancient Blood
- TNG - Strange New Worlds V short story: "The Farewell Gift"
- ST video game: Starfleet Command
- FASA RPG module: The Orions: Book of Common Knowledge