1940–1986♀ Joan Birkby Roydhouse | | |
| | 1913–1985♀ Agnes Gertrude Birkby 1892–1973♂ Harry Roydhouse 1915–2004♂ Douglas James Walton | | | | 1866–1939♂ William Richardson Roydhouse 1870–1936♀ Frances Elizabeth Cox | | | | 1839–1898♂ John Roydhouse 1837–1888♀ Hannah Richardson | | | | 1812–1882♂ Thomas Roydhouse | | |
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