Janine Lambertine Marie Angele De Greef (born 25 September 1925, Etterbeek, Belgium[1] – died 7 November 2020, Brussels) was a member of the Comet escape line in the Belgian and French Resistance during World War II.

As a teenager, together with her mother, Elvire; father, Fernand; and brother, Frederick, she helped Allied airmen shot down over Europe to escape from France to Spain.

On more than 20 occasions, De Greef guided groups of airmen, most of whom did not speak French, from Paris to near the border with Spain by railroad.

Belgians created the Comet Line to help the downed airmen escape from occupied Europe which involved travel from Belgium to southern France, usually by railroad, and hence across the Pyrenees by foot into Spain and safety.

Few of the airmen spoke French and they needed documents, shelter, civilian clothing, food, and guides to successfully evade capture.

Sixteen-year old Janine de Greef's first job with the Comet Line in October 1941 was picking up two airmen at a nearby railroad station and guiding them to a safe house near the border with Spain.

In October she made her first trip alone to Paris and returned to southern France with four airmen and Comet line guide Elvire Morelle.