Gertrude Mary Lindell (11 September 1895 – 8 January 1987), Comtesse de Milleville, code named Marie-Claire and Comtesse de Moncy, was an English woman, a front-line nurse in World War I and a member of the French Resistance in World War II. She founded and led an escape and evasion organization, the Marie-Claire Line, helping Allied airmen and soldiers escape from Nazi-occupied France. The airmen were survivors of military airplanes shot down over occupied Europe. During the course of the war, Lindell was run over by an automobile, shot in the head, imprisoned twice, and captured and sent to Ravensbrück concentration camp. Her son Maurice was captured and tortured. Her son Octave (Oky), also captured, disappeared and presumably died in a German concentration camp.