Lady Ida Denison (died 1937) (1869–1937) Parents Lady Edith Somerset William Denison, 1st Earl of Londesborough Children Osbert Sitwell Edith Sitwell Sacheverell Sitwell Siblings Lady Lilian Denison William Denison, 2nd Earl of Londesborough Lady Edith Denison unknown daughter Denison Lady Mildred Denison Partners Sir George Sitwell, 4th Baronet