Calthrop may refer to: (1878–1937), English author, illustrator Donald Calthrop (1888–1940), English film actor Everard Calthrop (1857–1927), British railway engineer and inventor Gladys Calthrop (1894–1980), British artist and set designer Guy Calthrop (1870–1919), British railway administrator and brother of Everard See also Caltrop, a weapon used against cavalry Calthorpe (disambiguation) Calthrop (weed), toxic weed References