Mastiff dog breeds:

1. Tibetan Mastiff: The Tibetan Mastiff originated in Tibet, my country, and is known as the "Tiangu" in Tibet. The Tibetan Mastiff is large in size, fierce in character, and strong in temperament.

2. Argentine Mastiff: The Argentine Mastiff is the earliest purebred dog in Argentina. It is strong, brave, aggressive, and has strong dominance over other dogs and is not easy to train.

3. Bullmastiff: The Bullmastiff is a large working dog that originated in England in the mid-19th century. The Bullmastiff is also known as the gamekeeper's hound.

4. Brazilian Mastiff: The Brazilian Mastiff has a typical mastiff shape, with strong bones, compact structure but appropriate proportions, and a large but sensitive body.

5. English Mastiff: The English Bull Mastiff is a medium-sized guard dog with a fierce and terrifying appearance but a very kind personality.

6. French Mastiff: Its ancestors are mainly Roman Maluso, Spanish Mastiff and other dogs. This dog is not suitable as a family dog.

7. Kuda: The Kuda is a very unique mastiff. It is also a national treasure-level dog breed in Pakistan and is very popular in Asia.

8. Neapolitan: The Neapolitan is a mastiff breed from Italy. It walks as slow and heavy as a bear. It is the best guardian and defender of the human family.

9. Castro: It is a standard large and ferocious dog with a brave character, extraordinary courage and full toughness.

10. Great Dane: The Great Dane is also called the German Mastiff. It has short, thick and shiny hair, a large and narrow head, a noble and elegant appearance, a large body, plump muscles, and strong and powerful.