Lyska Kostio de Warkoffska (born April 20, 1896, in Baku, Russian Empire, now Azerbaijan; died March 13, 1986, in Boulogne-Billancourt, France),[1] also known as Lyska Kostio and from 1935 onward as Kostio de War, was a French fashion designer. In 1935, she founded the fashion house Kostio de War in Paris, specialising in high quality knitwear and crochet wear.