| | Dr. Robert Archibald Smithson Jr. 1914–2009 | | |
| | Robert Archibald Smithson Sr. 1887–1951 Denie Kathleen Millen 1891–1974 | | | | James Howard Millen 1861–1927 Mary Lee “Mollie” Mitchell 1866–1930 | | | | Harriet Miranda “Mary” Shemwell 1826–1906 | | | | | | | | Samuel J Shemwell 1776–1860 Jane “Jenny” Dickerson 1780–1850 | | |
| | | Nancy “Polly” Chappell –1856 |
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