With the “Name that book,” “Name that ship” and “Name that rank” threads going so well, I was inspired.
What’s the royal or noble title of these characters, and in what work of fiction did they appear? Rely on your own memory and don’t consult any other sources, please. Feel free to add your own names.
Elendil
Faramir (last known gig)
Buttercup
Robin Hood
Elizabeth III
Fiona
Charming (duh!)
Harkonnen
Manwe
Shaddam IV
Ruprecht
Doom
Palpatine
Elessar
John Clay (heheheheh)
Buttercup - Princess
Robin Hood - Earl
Fiona - Princess
Charming (duh!) - Prince
Harkonnen - Baron, if I’m remembering correctly.
Shaddam IV - Was he the Emperor at the start of Dune? (Been a LONG time since I read it.)
Palpatine - Emperor
Correct, but don’t forget your sources.
Oops
Buttercup - Princess Bride
Robin Hood - Various legends, TV shows, movies, comics, plays, mostly named for him.
Fiona - Shrek
Charming (duh!) - Various legends, TV shows, movies, comics, plays, usually rescuing the female lead.
Harkonnen - Dune
Shaddam IV - Dune
Palpatine - Star Wars
Elendil - first High King of Gondor and Arnor (Lord of the Rings, Silmarillion)
Faramir (last known gig) - Prince of Ithilien (Lord of the Rings)
Elizabeth III - Queen of the Star Kingdom of Manticore (Honor Harrington)
Manwe - King of the Valar (Silmarillion)
Doom - ruler of Latveria (Marvel comics)
Elessar - king of Gondor, Arnor, and the Reunited Kingdom (Lord of the Rings)
How about…
Pothos
Duncan
Gale
Leir
Vardamir Nólimon
He was the Padishah Emperor. Which might count for two, depending on how you parse it.
Cleon
Cleon - Emperor of the Galactic Empire when it unsuccessfully invaded the Foundation in “Foundation & Empire”
Duncan – King of Scotland (King of Scots?) in MacBeth (the one MacBeth murders to gain the throne)
Robin Hood – in some versions of the legends, Earl of Loxley (in others, of more common birth)
Ruprecht – mentially deficient pseudoprince portrayed for scamming purposes by Freddie Benson (Steve Martin) in Dirty Rotten Scoundrels.
Leir – King of the Britons (pre-Saxon, pre-Roman) according to Geoffrey of Monmouth; inspired Shakespeare’s King Lear.
Dor
Gloriana XII
Lorenzo the Kind
Doom could also be Thulsa Doom, preist-king nemesis of Conan the Barbarian.
Last King of Ankh.
Edited to Delete “Morpork”
How about:
Robert Baratheon
Gregor Vorbarra
Betsy
Emperor Gregor Vorbarra (Lois McMasters Bujold’s Vor series)
Queen Betsy (Maryjanice Davidson’s UnDead and … series)
Gloriana XII was, of course, the Duchess of Grand Fenwick (source: The Mouse that Roared) Bravo, jayjay, on giving me my fond nostalgia moment for the day. Probably for the week.
Kythereia, when you say “Pothos,” do you mean “Porthos”? I don’t think his ancestry or title were revealed, but he was one of Dumas’ Three Muskateers, if that’s whom you had in mind.
Right on all three - the last, in particular, brought a smile to my face. And you even remembered Martin’s con-man character’s name - impressive!
“Not mother…?” I love that movie.
Some more:
Almaviva
Altoum
Enrico Ashton
Dor: King of Xanth.
Nope, I mean ‘Pothos’. 
It’s a little bit of a stretch in terms of royalty or aristocracy, but Pothos is a ruler…