The Jack Russell terrier is a popular dog breed known for its energetic and playful nature. However, there are several other names that are used to describe this breed, including the Parson Russell terrier, the JRT, and the Russell terrier. These names are used interchangeably, but the term "Parson" is often associated with a slightly different appearance and temperament. The JRT abbreviation is commonly used among dog enthusiasts and breeders, while the term Russell terrier is more commonly used in Australia and New Zealand. All in all, regardless of which name you use, the Jack Russell terrier is a beloved and lively companion that brings joy to many homes.