I too am obsessed with Game of Thrones, but I admit I came late to the game. I saw the books at the stores for years and refused to read them. “I am not getting involved in another long series, especially one that likes to kill off the good characters. Not even for one with dragons and direwolves” I said and plus Martin has really weird character name. Then the HBO series started and still I avoided it, until I could avoid no longer. Now there is a website JoinTheRealm.com so that you too can “create a coat of arms, or the tool can generate one for you. After all, you can’t be a Lord in Westeros battling for the Iron Throne without a sigil for your bannermen to proudly wear” (http://mashable.com/2013/03/27/game-of-thrones-hbo-coat-of-arms).
Here is one that I created for House Aho:
