The Slovak Cuvac is a Slovak breed of dog, bred for use as a livestock guard dog. This mountain dog—also known as Slovensky Cuvac, Slovak Chuvach, Tatransky Cuvac and Slovensky Kuvac—is closely related to the Hungarian Kuvasz. The alternate German and English spelling Tchouvatch reflects the pronunciation: chew-votch. The breed is recognised under sponsorship from Slovakia by the Fédération Cynologique Internationale with the name Slovenský čuvač. Despite the multiple renderings in English, these refer to only one breed. The United Kennel Club in the US uses the English version of the name Slovak Cuvac.

Source: Wikipedia

Slovak Cuvac