They were probably from Turkish origin.
During their moving West the Huns had created a wave of invasions.
Lead by Atilla the Huns crossed in 451 the Rhine.
However, they were beaten by Aetius and allies, among which was Theodoric I king of the Visigoths, in the Battle of Catalaunic Field

Links:
Invasion of Gaul
Newton Chapter 6: the Ten Horns
The fifth century
The Chinese Empire I: From Unification to Disintegration
Invasion of Gaul
The Silk Road
Chronology of Steppe Empires
The Turks in the course of ancient times
The Silk Road: crossroads of cultures
The Huns
Turkish History under the Light of Chinese Resources
Huns
The Huns