Newfoundlands:
http://en.wikipedia.org/wiki/Newfoundland_(dog)
Post WWII one Newf was bred to a BMD so there is a very small genetic similarity.
"Today, December 21, marks the 63rd birthday of one of the most
illustrious characters in the long and distinguished history of
Bernerdom: Babette v. Schwarzwasserbachli, a wonderful Yuletide
gift in 1948 whose heritage can inspire us today.
Babette's unique role in the chronicles of Bernerdom is tied to
her status as a Berner heritage dog of the mixed persuasion.
Taking fate boldly into their own paws, as told by the records of
the Swiss Berner Sennenhund Club, the noble Christine v. Lux and
the distinguished Newfoundland Pluto v. Erlengut sometime in
October of 1948 joined together in a most happy and fruitful
alliance bringing forth in due time Babette, bearing the
outstanding virtues of both breeds."