Cây tương tác của Dana B. Britt
–♀ Dana B. Britt
1938–♂ Michael Joseph Roydhouse
1902–1981♂ Clarence Edward Roydhouse
1907–♀ Margaret Fisher …
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 …