Yes, that's who I was thinking of who pronounced it "Gram" was the king himself, but Cedric pronounced it "Gray-um" straight afterwards! On top of which, Alexander pronounces it as "Gray-um" in KQ6.
I did notice that the narrator had a very strange pronunciation of "Valanice" as well (where the a's sounded more like o's), but the most prominent was definitely Titania.
I'd say just for a continuity thing for characters to pronounce names the same way they did in the original talky games, personally speaking. It doesn't stop me loving the game any less; it's just a nit odd when characters who have pronounced a name one way in a previous game start pronouncing it differently.