Jac al'Seen is a farmer from the Two Rivers.
When Trollocs appeared in the Two Rivers, he provided safety for many of his neighbours at his large farm, including the families of his cousin Wit and of Flann Lewin and Natley Lewin. Tam al'Thor says he is a good man.
When Perrin Aybara and his group visit their farm, Jac greets them. He tells Perrin that the Whitecloaks have been naming him a Darkfriend, which they do not believe but want to know why they would accuse him of such a thing. He accepts the story Perrin gives.