Compact tree of Errol Bruce Clarke Simmons
| George Frederick MacKenzie – | |||||||||||||
| Henry Thomas Swan 1846–1882 | Carlyle Bruce Swan 1893–1954 | Alice Isabelle Margaret Mackenzie 1856–1945 | |||||||||||
| Mahalah MacKenzie – | |||||||||||||
| Earlston Leonard Rupert Simmons 1918– |
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Harriet Elizabeth Bruce Swan 1919–1939 | |||||||||||
| Frederick George Lough 1876–1985 | Fredericka Bernice Lough 1894–1985 | Theresa Harriet Swan 1864–1903 | |||||||||||