Suebi
The Svebi or Svevi (from Proto-Germanic *swēbaz, either based on the Proto-Germanic root *swē- meaning "one's own" people, from an Indo-European root *swe-, the third person reflexive pronoun, or borrowed from a Celtic word for "vagabond") were a group of Germanic peoples who were first mentioned by Julius Caesar in connection with Ariovistus' campaign, c. 58 BC;
Some Suebi remained a periodic threat against the Romans on the Rhine, until, toward the end of the empire, the Alamanni, including elements of Suebi, brushed aside Roman defenses and occupied Alsace, and from there Bavaria and Switzerland. A pocket remained in Swabia (an area in southwest Germany whose modern name derives from the ancient name), whereas migrants to Gallaecia (modern Galicia, in Spain, and Northern Portugal) established a kingdom there which lasted for 170 years until its integration into the Visigothic Kingdom.
Read more about Suebi: Classification, Norse Mythology