『ゲルマニア』を発見したのは誰
The name came into use after Julius Caesar and whether it was used widely before him amongst Romans is unknown. The term may be Gallic in origin. Caesar reports hearing from his Remi allies that the term "Germani" was used for the group the Romans called the Germani Cisrhenani, and that these tribes had historically come from over the Rhine, so the name Germania seems to have been extended to cover the similar tribes in the area understood to be their homeland. Some generations later, Tacitus claimed that this is precisely what happened, saying that the Tungri of his time, who lived in the area which had been home to the Germani Cisrhenani, had changed their name, but had once been the original Germani. Tacitus wrote in AD 98:
Julius Caesar