Interactive tree of Sarah Dahm
1981–♀ Sarah Dahm
1950–♂ Bruce Dahm
1949–♀ Cheryl Ann Roydhouse
1914–1991♂ Cedric Roydhouse
1920–2010♀ Mary Ellen Birkett
1877–1943♂ Francis William Roydhouse
1883–1973♀ Muriel Blanch Crawley
1896–♂ Spencer William Birkett
1899–♀ Mary Ellen Wotton