Marian Charlotte Emily Cokayne (died 1873) (d. 1873) Parents Thomas Cokayne Children Algernon Charles Dudley Ryder Stewart Leveson Dudley Ryder Marian Frances Georgiana Ryder Lionel George Dudley Ryder John Edward Dudley Ryder Hugh Cuthbert Dudley Ryder Beatrice Mary Frederica Ryder Frederica Constance Dorothy Ryder unknown son Ryder Helena Augusta Cockayne Ryder Partners Frederick Dudley Ryder