Сократ Схоластик
Octar, identified with Ouptaros, according to Socrates of Constantinople died in 430 near Rhine, "For the king of the Huns, Uptaros by name, having burst asunder in the night from surfeit, the Burgundians attacked that [the Huns of Uptaros] people then without a leader; and although few in numbers and their opponents many, they obtained victory"".