The earliest known use of the name America dates to April 25, 1507, when it was applied to what is now known as South America. It is generally accepted that the name derives from Amerigo Vespucci, the Italian explorer, who explored the new continents in the following years on behalf of Spain and Portugal, with the name given by German cartographer Martin Waldseemüller.
Who’s gonna tell him?
— https://en.wikipedia.org/wiki/Naming_of_the_Americas