Family: Robert Owen Trewartha / Edith Thopson Bilkey (F525)
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 | Philippa Mary Bilkey (1868-1942)  |
 | Gladys Mildred Lovedy Lillian Daisy Bilkey (1893-1964) |
| Edith Thopson Bilkey (1883-1966)
|
 | Robert Owen Trewartha (1875-1943) |