Lucy Christiana , Lady Duff-Gordon ( née Sutherland ) ( 13 June 1863 -- 20 April 1935 ) was a leading fashion designer in the late 19th and early 20th centuries , best known as `` Lucile '' , her professional name .
Lucy , Lady Duff-Gordon ( born Lucy Christiana Sutherland , 13 June 1863 -- 20 April 1935 ) was a British fashion designer in late 19th and early 20th centuries . She used the professional name Lucile as a designer .