His grandfather was a son of[3] Lewis Morris (1726–1798), signor of the Declaration of Independence, from the prominent Colonial-era Morris family of the Morrisania section of the Bronx.
He was a manager of the Home for Incurables at Fordham, a director of the Zoological Society, and a vice-president of the Plaza Bank.
[1][6] On December 10, 1862, Morris was married to Eleanor Colford Jones (1841–1906),[7] daughter of General James I. Jones (1786–1858) and Elizabeth (1817–1874), the older sister of Caroline Schermerhorn Astor (1830–1908), also known as "The Mrs. Astor,"[8] Mrs. Charles Suydam, and Mrs. John Treat Irving.
[9] His wife died at their home, 19 East 64th Street, in April 1906,[7] and Morris died shortly thereafter on September 1, 1906, at his country home in Ridgefield, Connecticut.
[1] Through his son Augustus,[9] he was the grandfather of Augustus Newbold Morris (1902–1966), who was a lawyer, president of the New York City Council, and two-time candidate for mayor of New York City,[10] George Lovett Kingsland Morris (1905–1975),[11] a painter who married Suzy Frelinghuysen,[12] and Stephanus "Stephen" Van Cortlandt Morris (1909–1984),[13][4] a diplomat.