An Etymological Dictionary of the German Language/Kürbis
Kürbis, m., ‘gourd, pumpkin,’ from the equiv. MidHG. kürbeȥ, kürbiȥ, OHG. churbiȥ, m. (rarely f.); borrowed previous to the HG. permutation (of t to ȥȥ) from Lat. cucúrbita, whence also AS. cyrfet. Whether the reduplicated form of the Lat. word was influenced by Teut. itself cannot be determined. From Lat. cucurbita are also derived Ital. cucuzza, Fr. gourde, whence E. gourd, Du. kauwoerde.