The Mastin Espanol or Spanish Mastiff, is a giant breed of dog, originating in Spain, originally bred to be a guard dog whose purpose is to defend livestock from wolves and other predators. The Mountain dog type has a heavier coat. The Spanish Mastiff is a very large and powerful dog, similar in appearance to the other Mastiff breeds. They have a large powerful head and serious and vigilant expression. This noble giant is aloof, dignified, calm and intelligent. Check out our collection of Spanish Mastiff dog names for male or female puppies.