Kerroa is part of the Northern Lands that lays north of Meroa along the coast. This area is even more primitive, colder, and nastier than unpleasant Meroa. It's also heavily forested, has no central government, and is mostly inhabited by isolated villages of fisherfolk. Its total population is smaller than some single streets in Ethshar of the Spices.
To the north of Kerroa lays the uninhabited Ice Coast.