http://en.wikipedia.org/wiki/American_continent#Naming_of_America
The earliest known use of the name America for the continents of the Americas dates from 1507. It appears on a globe and a large map created by the German cartographer Martin Waldseemüller in Saint-Dié-des-Vosges. An accompanying book, Cosmographiae Introductio, explains that the name was derived from the Latinized version of the explorer Amerigo Vespucci's name, Americus Vespucius, in its feminine form, America, as the other continents all have Latin feminine names. Christopher Columbus, who had first brought the continents' existence to the attention of Renaissance era voyagers, had died in 1506 (believing, to the end, that he'd discovered and conquered part of India) and could not protest Waldseemüller's decision.
A few alternative theories regarding the continents' naming have been proposed, but none of them have any widespread acceptance. One alternative first proposed by a Bristol antiquary and naturalist, Alfred Hudd, was that America is derived from Richard Amerike, a merchant from Bristol, who is believed to have financed John Cabot's voyage of discovery from England to Newfoundland in 1497. Supposedly, Bristol fishermen had been visiting the coast of North America for at least a century before Columbus' voyage and Waldseemüller's maps are alleged to incorporate information from the early British journeys to North America. The theory holds that a variant of Amerike's name appeared on an early British map (of which however no copies survive) and that this was the true inspiration for Waldseemüller.
Another theory, first advanced by Jules Marcou in 1875 and later recounted by novelist Jan Carew, is that the name America derives from the district of Amerrique in Nicaragua. The gold-rich district of Amerrique was purportedly visited by both Vespucci and Columbus, for whom the name became synonymous with gold. According to Marcou, Vespucci later applied the name to the New World, and even changed the spelling of his own name from Alberigo to Amerigo to reflect the importance of the discovery.
Vespucci's role in the naming issue, like his exploratory activity, is unclear. Some sources say that he was unaware of the widespread use of his name to refer to the new landmass. Others hold that he promulgated a story that he had made a secret voyage westward and sighted land in 1491, a year before Columbus. If he did indeed make such claims, they backfired, and only served to prolong the ongoing debate on whether the "Indies" were really a new land, or just an extension of Asia.
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One big problem with illegal immigration of any person,
no matter where they are from, is the introduction of disease. Yeah, there are job issues and tax issues and welfare issues. Did you know that tuberculosis is on the rise again, after nearly being wiped out in this country? That is just one example. Most of these diseases are highly communicable, and these folks aren't getting health care for a number of reasons. Then we go to the market and use the same shopping cart or stand next to someone who is infectious and we most likely would have no immunity to whatever it is. That is how epidemics get started.
Heather