House Greyjoy is one of the Great Houses of Westeros, known for its seafaring culture and strong ties to the ocean. Their ancestral seat is Pyke, located on the Iron Islands. The Greyjoys are known for their motto, "We Do Not Sow," which reflects their belief in raiding and pillaging rather than traditional farming. The head of House Greyjoy is the Lord of the Iron Islands, and they are known for their fierce independence and pride. The Greyjoys often engage in conflict with other houses, particularly the Starks of Winterfell, due to their rebellious nature and desire for autonomy.