Algernon Frederick Roland Dudley Ryder (1891-1957) (1891–1957) Parents Algernon Charles Dudley Ryder Constance Eugenia Smith Children Charis Elizabeth Ryder Dione Frances Ryder Xanthe Veronica Ryder Siblings Mary Constance Eugenia Ryder Dorothy Evelyn Frances Ryder Cecily Blanche Dorothy Ryder Joan Florence Helen Ryder Hugh Granville Leveson Dudley Ryder Philippa Constance Marian Ryder Partners Olive Baillie