| | Wendell Blackett Nelson 1930–2012 | | | | Oliver Willard Nelson 1897–1943 Ferrel Blackett 1897–1978 | | | | Oliver Willard Nelson 1874–1935 Elizabeth Allsebrook Taylor 1879–1915 |
| | | John William Blackett 1869–1932 Agnes Hannah Edwards 1869–1910 | | | | John William Blackett 1848–1927 Elizabeth Jane Averett 1854–1931 | | |
| | | William Edwards 1841–1925 Helen McCulloch Miller 1844–1908 |
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| | | Leo John Aitken 1900–1936 Alberta Tuckett 1902–1976 |
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