Karl Wilhelm Gottlieb Leopold Fuckel was a German botanist who worked largely on fungi. He worked as an apothecary from 1836 to 1852, afterwards deriving income from a vineyard he owned in Oestrich im Rheingau. The species epithet in the binomen Botryotinia fuckeliana, a plant pathogen and the causal agent of gray mold disease, was named by mycologist Heinrich Anton de Bary in honor of him.