Smithson
- Thomas Smithson b c1680 d 1732 Baltimore Co., MD m Ann Scott - Christopher T. Smithson [ctsmithson AT verizon.net]
- Thomas b 30 Jan 1712 Baltimore Co., MD d bef 3 Oct 1795 Harford Co., MD m Mary Grafton
- Thomas Smithson III b 1742 d 1777 m Sarah Bond - Sherry Smithson-Snyder [lowellsnyder AT sbcglobal.net]
- Thomas Smithson IV b 1772 d 1854 m Margaret Alderson
- George Albert Smithson b 1797 d 1885 m Elizabeth Caldwell
- John Aldereson Smithson b 1838 d 1912 m Sarah F. Still
- Spencer Cree Smithson b 1870 d 1951 m Minnie Lee Boalt
- Everett Elbert Smithson b 1901 d 1969 m Bessie Hankins
- Daniel b 1743 Baltimore Co., MD d 22 Feb 1798 Pylesville, Harford Co., MD
- William b 1779 Harford Co., MD d 3 Dec 1836 Harford Co., MD m Margaret Hall Lee
- Dr. George W. b 1 Jul 1815 MD d 30 Jun 1858 Lancaster Co., PA m Magraret A. Boyd
- Dr. Frank P. b 16 Aug 1852 Lancaster Co., PA d 26 Aug 1921 MD m Priscilla F. Smithson
- Arthur C. b 26 Aug 1893 Harford CO., MD d 3 Jan 1961 MD m Lillian M. Wildason