Oh. And of course, the most obvious one of all--
Aemon the Dragonknight championing Queen Naerys against the slanders of the evil Sir Morgil=Lancelot championing Guinevere against the slanders of the evil Sir Mordred.
I would also like to note that in The Mists of Avalon, the sword Excalibur is forged from the metal of a falling star.
Of course, Dawn looks a heck of a lot more like Eirias (alive and shimmering like crystal), and oh, blood and bloody ashes, it bears a certain resemblance to Callandor as well.
Also, while I'm on a Jordan kick, the arms for House Toland of Ghost Hill is a serpent eating it's own tail, and the serpent is Time.
Arys Oakheart's mother's name is Arwyn.
Real-life stuff
When I heard about a drear fortress off the coast of a sunny kingdom used as a prison, I initially thought "Alcatraz"
Nymeria and her thousand ships are sort of similar to Grace O'Malley, the Irish Pirate Queen.
The Unsullied, being slave soldiers and fearless infantry, are very like the Mamelukes. In fact, I think that they actually had a confrontation with the Mongols that was like the Three Thousand at Qohor at some point, but I'll have to look it up.