These cool set of Game of Thrones face cards were designed by Simona Bonafini, a freelance digital designer based in Milan, Italy. Bonafini made an impression a few months back with her Disney Princesses and other Disney characters Selfie Instagrams.
Game of Thrones with its constant shifting allegiances, surprise deaths and climaxes and attention to unconnected and connected individual Royal Houses strategies and bluffs plays more like a card game than a strategy board game like chess.
Bonafini does get everything to be a good match. The suits do reflect the personalities of the four Royal Houses well: The Lannisters as Hearts, The Tyrells as Clubs, The Starks as Spades and The Baratheons as diamonds. Of course, the joker wildcard is perfectly suited for the role-- Daenerys Targaryen.
You can see more of Simona Bonafini's work at her Behance page.