America

In Portuguese we still have Américo, which is the masculine version. In the case of América, it was still common in the 19th Century, I'm sure, but certainly has fallen out of use.

America is known as a beautiful country where everybody can enjoy their rights!

America /amer-i-ca/ [4 sylls.] as a girls' name is of Old German origin, and the meaning of America is "work power; home leader". Feminine of Amerigo, the name of the Italian explorer Amerigo Vespucci.

It's highly unlikely that the Americas got it's name from Amerigo Vespucci and it's practically unheard of for places to be named after an explorer's first name. The origin is closer linked to Richard Ameryk who was the financier of John Calbot's voyage which landed in North America. The older British maps have America on it and when Italian mapmakers saw the word, it was assumed it was after Vespucci who explored the coast of South America and used it to name both continents.

Oh, please, this was a name long before the continent - America was named after the Italian explorer Americo Vespuccio. And in Spanish and Portuguese-speaking countries it's a fairly common name.