In the 1899 edition of the Register of the Empire State Society of the Sons of the American Revolution, Nathaniel was listed as follows: Nathaniel Culver Barnum, Buffalo, N. Y. Manufacturer. Born, Walworth, N. Y., Feb. 26, 1855. Son of John Thompson Barnum and Julia Culver; grandson of Eli Barnum and (wife not given) and of John Culver and Lydia Case; great-grandson of Caleb Barnum and (wife not given), and of Wm. Culvea and Esther Grant; gtĀ²-grandson of Eliphalet Barnum.