sentences:  His paternal grandparents were Frederick Frelinghuysen and Mary (née Dumont) Frelinghuysen.His grandfather died when his father was just three years old, so his father was adopted by his uncle, Theodore Frelinghuysen.Both grandfather and adopted grandfather were sons of Frederick Frelinghuysen, the eminent lawyer who was one of the framers of the first New Jersey Constitution, a soldier in the American Revolutionary War, a member of the Continental Congress, and a member of the United States Senate.