Elsie Knocker

British nurse and ambulance driver

Elsie Knocker, later Baroness de T'Serclaes, MM, OStJ (29 July 1884 – 26 April 1978) was a British nurse and ambulance driver in World War I who, together with her friend Mairi Chisholm, won numerous medals for bravery and for saving the lives of thousands of soldiers on the Western Front in Belgium.

Dubbed "The Madonnas of Pervyse" by the press, the two were among the most photographed women of the war.