From where did Pepsi get it´s name?
Pepsi, one of the biggest brands in the world got it´s name from Pepsin, an enzyme that helps digestion. Pepsi's creator, Caleb Bradham, claimed Pepsi helped digestion.
It was originally launched as "Brad´s Drink"
Successful brand names are often times the simplest.
Source:
http://wiki.name.com