Bartholomew Dias, a Portuguese sailor, sailed along the western coast of Africa and reached the southern tip of the landmass.
In 1498, Vasco da Gama went around the Cape of Good Hope and reached Calicut in India.
Columbus assumed that he had landed in India and so, he named it the 'East Indies'.
Amerigo Vespucci discovered the sea route to a different and vast landmass and called it the ‘New World’. It was later named 'America' after Amerigo himself.