What we really are

From Wikipedia:

Amerigo Vespucci used a Latinised form of his name, Americus Vespucius, in his Latin writings, which Waldseemüller used as a base for the new name, taking the feminine form America.

Amerigo itself is an Italian form of the medieval Latin Emericus, which through the German form Heinrich (in English, Henry) derived from the Germanic name Haimrich.

So...we are the United States of Henry.