German physician, mycologist and botanist (1770–1848).
Friedrich Wilhelm Gottlieb Theophil Rostkovius (1770–1848) was a German medical doctor, mycologist and botanist. In 1801, he received his doctorate from the University of Halle with the thesis Dissertatio Botanica Inauguralis De Junco (treatise on rushes), studying under Carl Ludwig Willdenow. He later settled in Stettin as a medical practitioner and continued to study plants and fungi, and publish on them. The plant genus Rostkovia from the family Juncaceae was named in his honor by Nicaise Auguste Desvaux (1784-1856). His name is also associated with the species Euphrasia rostkoviana.