Genseric

Genseric or more often Gaiseric or sometimes Geiseric , was King of the Vandals and Alans who established the Vandal Kingdom was one of the key players in the troubles of the Western Roman Empire in the 5th century. During his nearly 50 years of rule, he raised a relatively insignificant Germanic tribe to the status of a major Mediterranean power which, after he died, entered a swift decline and eventual collapse.

Genseric was an illegitimate son of King Godigisel he is assumed to have been born near Lake Balaton around 389. After his fathers death in battle against the Franks during the Crossing of the Rhine 406 AD, Genseric became the second most powerful man among the Vandals, after the new king, his halfbrother Gunderic.

Source: Wikipedia