Some more considered ideas. Let me know which you are most drawn to.

a) Riverlands House. Old and loyal to the people of the Kingdom. Situated near the Kingsroad. Large wheat and corn fields. Main export is crops. Loyal to House Tully and Catelyn Stark.

b) Stormlands House. Maritime, seafaring. Shipbuilders. Main export is lumber. Loyalties undecided. Pro-self survival.

c) Northern House. Very old. Very well defended hold. Warrior people. Loyal to House Stark. Based in snowy hills. Stalwart.

d) Northern House. Based in forest near the Neck. Much gloomier, reclusive. Intelligent, and battle hardened. Loyal to House Stark.