 John Jay Marshall was a legislator, law reporter and judge, whose father, also named Humphrey Marshall, was a member of the United States Senate from Kentucky.This elder Humphrey Marshall was a nephew of Chief Justice John Marshall's father, Thomas Marshall.The younger Humphrey Marshall's uncle James G. Birney was a well known abolitionist, and two first cousins, William Birney and David B. Birney, served as major generals in the Union army.