Mary Trefusis noblewoman; English hymnwriter and courtier (1869–1927) Parents Mary Catherine Stanhope Frederick Lygon, 6th Earl Beauchamp Children Henry Trefusis Siblings Edward Lygon Lady Susan Lygon William Lygon, 7th Earl Beauchamp Margaret Russell, Baroness Ampthill Henry Lygon Maud Hoare Robert Lygon Agnes Lygon Partners Henry Hepburn-Stuart-Forbes-Trefusis