The name Mastiff derives from the Anglo-Saxon word "masty" meaning stout or powerful. It was first recorded in a Court role in l251.
Tibetan Mastiff
A loyal companion and natural guardian. Highly intelligent, strong-willed, independent, aloof and protective when necessary. Patient and tolerant, may be wary of strangers. Dogs- minimum 26 inches (ranging to over 30 inches). Bitches- minimum 24 inches (ranging to over 28 inches). Though appearing square, the body is slightly longer than high (10 to 9), front and rear angulation is balanced. Slow to mature, dogs range from 100-160+ lbs., bitches range from 75-120+ lbs. (Tibetan Mastiff Club of America).
Bullmastiff
Fearless and confident yet docile. The dog combines the reliability, intelligence, and willingness to please required in a dependable family companion and protector. Size--Dogs, 25 to 27 inches at the withers, and 110 to 130 pounds weight. Bitches, 24 to 26 inches at the withers, and 100 to 120 pounds weight. (American Kennel Club, akc.org)
French Mastiff
This former fighting dog is an excellent guard dog that vigilantly protects the home with courage, though not aggression. The French Mastiff does not like to socialize with other dogs. This gentle, calm, sensitive dog forms a strong bond with his owner and is very affectionate with children. He rarely barks. This breed detests solitude and lack of activity. This dog must be exceptionally well-trained in order to keep him under control. Dog: 60 to 68 cm. (23.5-27 in).Bitch: 58 to 66 cm. (23-26 in). Dog: at least 50 kg. (110 lb).Bitch: at least 45 kg. (99 lb). (Furry Critters.com)
Neapolitan Mastiff
The Neapolitan Mastiff displays a graphic illustration of one of the most impressive and remarkable breeds that is in existence today. He is a large breed which can weigh over 150 pounds. A comparison to man or other creatures of a similar weight and one would see a body structure exemplifying extreme strength. A type that can perform its function better than any other creature or man made machine. His body mass is volumous but not that of just fat. His muscular development would cause a game or herding dog to fail at its chores but for the Neapolitan Mastiff this is a trade off he assumed when he chose to be a guardian. (United States Neapolitan Mastiff Club)
Old English Mastiff
Large, massive, powerful, symmetrical, well knit frame. A combination of grandeur and courage. Calm, affectionate to owners, but capable of guarding. (Old English Mastiff Club)
He gets inside to stare at her, the seeping mouth, the mouth that knows, the secret you, always you. A smile to hide the fear away, oh smear this man across the walls, like strawberries and cream, its the only way to be!