Amruca - Land of the plumed serpent. That’s what the Incas called this land. That’s where we got the name.
The tradition is that it was named after Amerigo Vespucci.
https://en.wikipedia.org/wiki/Amerigo_Vespucci#Naming_of_America
I was always taught we got the name from the Italian explorer and navigator Amerigo Vespucci. He was from the Republic of Florence and participated in at least two voyages of the Age of Discovery between 1497 and 1504, first on behalf of Spain and then for Portugal.