| | William Robert Tarn 1900–1962 Susanna Metcalf 1901–1988 | | |
John Winston Tarn 1907–1995 | | |
| | Sylvester Timothy Tarn 1911–1999 Ruby Georgina Waller 1910–1994 | | |
| | Edwina Hannah Blackett 1877–1956 | | | | Mary Elizabeth Swinbank 1842– |
| | | Robert Blackett 1848–1896 | | | | Cuthbert Blackett 1814–1875 | | | | Cuthbert Blackett 1778–1861 Ann (Hannah) Bell 1777–1859 | | | | Cuthbert Blackett 1745–1809 | | |
| | | Hannah Richardson 1756–1842 |
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