It is true that the Entelbucher is a Swiss dog:

The Entlebucher (Entlebuch Mountain Dog/Entlebucher Cattle Dog) is the smallest of the four Swiss
Sennenhund breeds. The crossing of the Roman Mastiffs with the local Swiss working dogs during the
time of the Roman invasion of Europe resulted in the Sennenhunds: the Greater Swiss Mountain Dog,
Appenzeller, Entlebucher and Bernese Mountain Dog. It is generally accepted that the Greater Swiss
Mountain Dog was the first of these breeds, and the other three developed from it. The Entlebucher was
primarily used by Alpine herdsmen to drive cattle.

The Entlebucher was recognized by the United Kennel Club on January 1, 1993.

From the ukc page