| | Zina Ellen Duncan 1895–1989 James Duke Mecham 1885–1976 | | |
Ivan Henry Duncan 1893–1974 | | |
Florence Evelyn Duncan 1897–1976 | | |
Eldon Joy Duncan 1911–1983 | | |
Amanda Lorene Duncan 1918–1971 | | |
| | Amanda Jane Moon 1870–1968 | | | | | Temperance Westwood 1839–1922 Mary Ann Thayne 1849–1927 | | | | | | | | | | | | | Robert Siboring 1703–1765 | | |
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| | | | Joseph Westwood 1797–1849 | | | | | | | | | Sarah Harrill (or Orrel) 1758–… |
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| | | John Johnson Thayne 1825–1910 |
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