Mary Winifred Swayne (1870-1958) (1870–1958) Parents William John Swayne Children Sir Evan Yorke Nepean, 6th Bt. Mary Theresa Nepean Olivia Nepean Winifred Diana Nepean Sylvia Nepean Siblings William Swayne Partners Sir Charles Evan Molyneux Yorke Nepean, 5th Bt.