In short, the names were given by the Greeks and to further explore this subject read the following,
List of continent name etymologies
List of continent name etymologies - Wikipedia, the free encyclopedia
**The grouping part is still in progress i.e.
- Europe[European Union redefining the landscape, Turkey being the prime example of wanna be europe.],
- NA[with mexico trying desperately to be part of it, regardless of the fact that it is geographically.],
- Central Asia[No clear borders, just treaties.],
- I can go on and on about China’s recent activity but its the same around the world.
- Also, have a look at Diego Garcia and Chagos Islands.**