“House Greyjoy of Pyke is one of the Great Houses of Westeros. It rules over the Iron Islands, a harsh and bleak collection of forbidding islands off the west coast of Westeros, from the Seastone Chair in the castle of Pyke on the island of the same name.” (A Wiki of ice and fire)
My son started a small Greyjoy army for GoT Dragon Rampant games. It will basically be a longboat full of warriors.
And here are the single warriors : There will be more in the future:
The figures are build out of the Gripping beast Vikings box and the new HYW boxes of the Perrys