|Book(s)||The Sworn Sword (appears)|
Wat, also known as Wat Barleycorn, was a farmer in service to House Osgrey. He had a younger brother, Wet Wat. He was given the name barleycorn, which derives from the crop planted in the town he comes from, in an effort to distinguish him from the other Wats. He was to be wed the next time the septon came through.
Wat was among those that were called by Ser Eustace Osgrey to defend Osgrey lands after a disagreement over the Chequy Water with House Webber escalated into threats of war. Ser Duncan the Tall sent him home with the others after he realized that it would be futile to fight.