The German Rex is genetically compatible with Cornish Rex. The breed was developed by Dr. Rose Scheuer-Karpin from Germany and Professor Letard from France in the 1950s. Although a quite rare breed, it can be found under the same name in Europe. The type has remained the same: fairly heavy bone structure, roundish head, wide-set ears and a thick tail. The fur is dense, longer than that of the Cornish Rex.
The various rex breeds were discovered and developed quite independently of each other. They were all, however, due to spontaneously mutating occurring mutant genes. They were named after the regions in which they were discovered.