Short answers, pulled from the story.
The Suebi were a large grouping of Germanic peoples first reported by Julius Caesar in the 1st century BC. They originated near the Elbe River in what is now Eastern Germany, in a region archaeologically associated with the Jastorf culture. Over several centuries, Suebian groups spread across Central Europe, eventually reaching Spain, Portugal and Italy.
Caesar described the Suebi as the largest and most warlike nation of all the Germanic peoples. He noted they were divided into a hundred districts, each capable of supplying a thousand men for military campaigns every year, and that they had no private ownership of land and a rule against staying in one place for more than a year. Caesar confronted Suebian forces in 58 BC when he defeated the king Ariovistus, whose first wife was Suebian.
The most widely accepted scholarly view links the name Suebi to a reconstructed Germanic adjective meaning "one's own," the same root found in the name of the ancient Swedes (Suiones). The Suebi would then mean "those who are of their own kind." A minority view holds the name was borrowed from a Celtic word for "vagabond."
The Kingdom of the Suebi was established in Gallaecia, the northwest corner of the Iberian Peninsula, after a large Suebian force entered Roman Hispania by 409 AD alongside Vandals and Alans. It was the last of the four kingdoms that these groups carved out of Hispania to survive, lasting from 409 to 585, when it was absorbed by the Visigothic kingdom.
The Suebi are generally agreed to have spoken Germanic languages that are the main predecessors of medieval Old High German and the modern German language. Modern languages that evolved at least partly from Suebian languages include standard German, Alemannic German (Swabian, Alsatian and Swiss German), and Bavarian and Austrian German. The name Swabia itself is a version of the Suebian name.
After the Marcomannic Wars (mainly 161-180 AD), Roman garrisons of twenty thousand men each were permanently stationed in Marcomanni and Quadi territory. Following the Battle of Adrianople in 378 and the arrival of Huns, Goths and Alans, Suebian groups fragmented. Some entered Roman Hispania, others were absorbed into the Alemanni and eventually became medieval Swabians, and many were assimilated into the Langobards (Lombards), who entered Italy in 568.