"Rhaegar" (the correct spelling) is still not accepted; also, d'you think you could allow "cut off his head", or something of that ilk for the Jaime question?
I think you should allow "Duncan the Tall" as an answer without having the "Ser" in front of it, and allow "Reed" without having "House" in front of it, especially since you already include "which house..." in the question.