Excerpts from Books and Wikipedia
"It is not certain precisely how many voyages Vespucci undertook, but his explorations covered the greater part of the Atlantic coast of South America down to the Patagonian coast. . . . Authorship of the published missives is disputed, but Vespucci certainly made the voyages and his name was attached to accounts of them--accounts that were later taken up by cartographer Martin Waldseemuller. In 1507, Waldseemuller produced a famous printed planosphere, which for the first time called the new hemisphere 'America.'" [1001 Days]