According to Wikipedia [1], it’s a matter of some debate, with the theories being the (standard) corruption of a name for the first Western Baltic people encoun

According to Wikipedia [1], it’s a matter of some debate, with the theories being the (standard) corruption of a name for the first Western Baltic people encountered, or a take on the “unintelligible war cry” people from the Latvian root for speaking. [1] https://en.wikipedia.org/wiki/Names_of_Germany https://en.wikipedia.org/wiki/Names_of_Germany