Cây tương tác của Catherine W. Williams
1960–♀ Catherine W. Williams
1938–♂ Michael Joseph Roydhouse
–♂ Bryan E. Chapman
–♂ Brian Edward Chapman
–♀ Janet Ann …
1902–1981♂ Clarence Edward Roydhouse
1909–1983♀ Catherine …
1907–♀ Margaret Fisher …
–♀ Gladys C. Grubbs
1873–1925♂ Burton Parker Roydhouse
1877–♀ Louisa Beatrice Price
1841–1910♂ Henry Roydhouse
1844–1913♀ Mary Elizabeth Bush
1816–1849♂ Thomas Henry Roydhouse
1809–1874♀ Sarah Anstiss
–♂ William Bush
1841–♂ John Price
1848–♀ Martha …