How did the Milwaukee-Eight engine get its name?

Harley-Davidson's modern V-twin is called the Milwaukee-Eight, and it's offered in a choice of different displacements. But ...
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Here Are All the Juicy Bits of Harley-Davidson's Intoxicating Milwaukee-Eight VVT 121

About two months after it said it would release new CVO versions for the Street Glide and Road Glide motorcycles, Harley-Davidson did just that. The wealth of details about what's new on the two rides ...