Abraham Winslow and Elizabeth Welch

I'm trying to find the parents of this couple married in N. Yarmouth on 12 Feb 1789. Abraham died in Freeport on Feb 1806 when a tree fell on him. Elizabeth was given his widow's pension for his service in the Continental Army, 8th Company, 3rd Massachusetts Regiment . I'm descended from their son Thomas and grandson Amasa. Any help would be greatly appreciated.