Robert Barnhill Roosevelt was born 7 August 1829 in New York City, Kings County, New York, United States to Cornelius Van Schaack Roosevelt (1794-1871) and Margaret Barnhill (1799-1861) and died 14 June 1906 Sayville, Suffolk County, New York, United States of unspecified causes. He married Elizabeth Thorne Ellis (1829-1887) October 1850 in New York City, New York, United States. He married Marion Theresa O'Shea (1848-1902) 18 August 1888 in Clapham Common, Greater London, England, United Kingdom.
|Offspring of Robert Barnhill Roosevelt and Marion Theresa O'Shea (1848-1902)|
|Kenyon Fortescue (1870-1939)|
|Granville Roland Fortescue (1875-1952)||12 October 1875 Manhattan, New York County, New York, United States||21 April 1952 Palm Beach, Palm Beach County, Florida, United States||Grace Hubbard Bell (1883-1979)|
|Maude Fortescue (1880-1961)|