The Devon Rex traces its origins to a single curly-coated kitten born in 1959 in Buckfastleigh, a small town in Devon, England. A woman named Beryl Cox noticed a feral, curly-coated tomcat living near an abandoned tin mine on her property. When one of her straight-coated female cats produced a litter, a single male kitten emerged with a strikingly unusual wavy coat. Cox named the kitten Kirlee, and he would become the founding father of the entire Devon Rex breed.
At the time of Kirlee's birth, the Cornish Rex had already been established as a recognized curly-coated breed originating from Cornwall, just one county over. Breeders initially assumed that Kirlee's curly coat was the result of the same gene responsible for the Cornish Rex mutation. However, when Kirlee was bred with Cornish Rex queens, all of the resulting kittens had straight coats, proving that the Devon Rex mutation was genetically distinct and caused by a completely different recessive gene.
This discovery was pivotal in establishing the Devon Rex as a separate breed rather than a regional variant of the Cornish Rex. The gene responsible for the Devon Rex coat, known as Gene II or re, produces a coat that is shorter, less dense, and more fragile than that of the Cornish Rex. Breeders quickly recognized that they had something entirely new on their hands, and dedicated breeding programs began in earnest throughout the 1960s.
Kirlee's genetic legacy is remarkable in the world of pedigreed cats. Because every Devon Rex alive today descends from this single male, the early breeding programs faced significant challenges related to genetic diversity. Breeders carefully outcrossed to British Shorthairs, Burmese, and other breeds to expand the gene pool while preserving the distinctive curly coat and elfin facial features that made the Devon Rex so unique.