Susanna Mary McTaggart-Stewart (1878-1961) (1878–1961) Parents Marianne Susanna Ommaney Mark MacTaggart-Stewart Children Isolde Frances, Lady Cooper Lady Cecilia Blanche Genevieve FitzRoy Lady Elfrida Marie Susanna FitzRoy Siblings Margaret Anna McTaggart-Stewart Frances Emily Kennedy, Marchioness of Ailsa Sir Edward MacTaggart-Stewart, 2nd Baronet Partners Alfred FitzRoy, 8th Duke of Grafton Archibald Patrick Thomas Borthwick, 20th Lord Borthwick