Swedenborgian who supported the printing and spreading of Swedenborg's writings. His grandson, the Swedish-American journalist Anders Leonard Gyllenhaal, retained the faith of his grandfather and was a member of the Swedenborgian New Church. His descendants in the American branch of the family include the actor siblings Jake and Maggie Gyllenhaal. References Olle Franzén, "Gyllenhaal, Leonard", Svenskt biografiskt lexikon, Vol. 17, pp. 558–561. Olle Franzén, "Leonard Gyllenhaal", a complete translation of the SBL article, without the references, but with pictures of the Höberg manor house and the "fly house". Biographies of Leonard and other members of the Gyllenhaal family in the Nordisk familjebok, 2nd ed., Vol. 10 (1909) (on Projekt Runeberg). Biographies of Leonard and other members of the Gyllenhaal family in Svenskt biografiskt handlexikon, vol. 1 (1906) (on Projekt Runeberg). See also Gyllenhaal family 1752 births 1840 deaths Swedish entomologists Swedish zoologists Swedish Swedenborgians Swedish military officers Members of the Royal Swedish Academy of Sciences Knights of the Order of Vasa Leonard