The local hangout for the gang was The Regal Beagle.
They are named after the company that makes them, Mars Incorporated.
The Baby Ruth Candy Bar was named after President Grover Cleveland's daughter, Ruth Cleveland according to claims by the Curtiss Candy Company. Legend has it that the Oh Henry! Candy Bar was named for a boy who used to flirt with the girls at the Williamson Candy Company.
A candy bar that is named after a red planet is the Mars bar. The company also has a candy bar called the Milky Way.
Regal Beagle
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Milton Hershey, the founder of the Hershey Company.
Don Knotts!
Twos company and threes a cloud
That is what the company of the candy wanted it to be named, beyond the name, Mars the Roman god and Mars the candy bar have little in common.
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Yes, she did play on that show.
Although the "Clark Bar" might have been named after William Clark (of Lewis & Clark), it is actually named for its candy company's founder, David L. Clark. (the bar is currently a brand of the Necco Company)