Pepsi is derived from the digestive enzyme pepsin.
Starbucks is named after Starbuck from the book Moby Dick.
Amazon is named after the Amazon, because Bezos wanted a name that began with A and the Amazon is the largest river in the world.
eBay was named because the original name Echo Bay was already taken as a dot com name.
Nike is named for the Greek goddess of victory.
Verizon is named after veritas (truth) and horizon.
Reebock is named after an African Antelope, Rhebok.