Queen Elizabeth from Shakespeare's historicals, but I'm not sure that counts as fictional.

Shylock, Merchant of Venice

Umbridge, Harry Potter.

Crap, you guys are fast. AND I GOT STUCK WITH W FOR THE THIRD TIME.

Wyllow from Mabinogi

And I get X again. Rawr!

Xatu, Pokemon.

Yukihina from Code:Breaker~

Zali from Wolf's Rain

Altair from Assassin's Creed~

Barret from Final Fantasy VII

Cid, from any finaly fantasy game. Just pick one. ;)

So we're going down the FF memory lane now? (my only games are FFIV adv for the SP and FFCC EoT)

Hm....FF seems to be a bit short on D names...

Dajh from FFXIII

Eomer! (Nothing FF or Shakespearean came to mind so back to Tolkein for me.)

Fred Flintstones.