Names of Countries - how did they get that way?

Duetschland is the name of the country in the old German language and what the people call themselves. We call them germans because the Romans call the region of their origins Germania. Allemagne= magne means great and alle is from the Allemanni tribe, which is one of the German tribes than inhabited France. We don't call other countries by the name they might use because our name usually comes from colonial terms, Anglicanized forms of names that may be difficult to pronounce, or latin names for places based on what the Romans called them.