The Vagoths were a Germanic tribe mentioned by Jordanes. He located them in Scandza. Speculations about their exact identity have identified them with the Geats of Vikbolandet and with the Gotlanders.
According to Lithuanian linguist Kazimieras Būga, the name of Germans, Germany in Lithuanian and Latvian languages (“Germany”: Lith. Vokia, Vokietija, Latv. Vācija, “German (person)”: Lith. vokietis, Latv. vācietis ) is derived from the name of Vagoths (*Vāk(ia)-goth). From Baltic languages originate Finnish roots Vuoja, Vuojo and Estonian Oju, Oja in their name for Gotland: Vuojola, Vuojonmaa, Vuojanmaa, Ojumaa, Ojamaa (“maa” - land).
The Valagoths were a tribe mentioned by Nennius.
References
Vagoth Wikipedia(Text) CC BY-SA