Hermeric

Hermeric was the first King of the Gallaecian Suebi, who in 406 migrated a sizable amount of the Suebi from above the Rhine (East Germany, Czechia, or Slovakia), to Galicia in Hispania.

Origin
The exact origin of Hermeric's Suebi and which portions of the confederation he ruled over cannot be clear. In 406, a document was written by Saint Jerome listing the various tribes that had crossed the Rhine. He lists the Quadi as crossing the Rhine, and not the Suebi, which would make the Quadi the most likely of the Suebi to have led into the Roman Empire. Hermeric would have been apart of the Quadi royal family, due to the fact that several decades later, the king of the eastern Quadi around the Carpathian Mountains was the son of Hermeric. It is not a guarantee that he was the ruler of the unified Quadi before his migration west and it is more likely that his father or uncle was the king at the time. Hunimund was about 70 or 80 years old when he passed away, which would have made him too young to rule over the Suebi if his father were to split off as the current king to head off into Hispania.

The last recorded confirmed Quadi king was Gabinius, who died fighting the Romans during the reign of Valentinian I. He was most likely in some way related to Hermeric, or possibly of a different dynasty. Due to Saint Jerome's recording of the Suebi migration, it can most certainly be concluded that he was of the Quadi

Ancient Sources
Hydatius Chronicle

Isidore: Historia de Regibus Gothorum, Vandalorum et Suevorum

Modern Sources
https://en.wikipedia.org/

https://books.google.com/books?id=BiXgsE7vsjcC

https://books.google.com/books?id=fyFACgAAQBAJ