The Heruli (also Eluri, Eruli, Herules, Herulians) were one of the smaller Germanic peoples of Late Antiquity, known from records in the third to sixth centuries AD. The best recorded group of Heruli established a kingdom north of the Middle Danube, probably including the area north of present day Vienna. This kingdom was a neighbour to several other small and short-lived kingdoms in the late 5th century and early 6th century, including those of the Sciri, Rugii, Danubian Suebi, and Gepids. After the conquest of this Heruli kingdom by the Lombards in 508, splinter groups moved to Sweden, Ostrogothic Italy, and present-day Serbia, which was under Eastern Roman control.
The Danubian Heruli are generally equated to the "Elouri" who lived near the Sea of Azov during the late 3rd or early 4th century, and are believed to have migrated westwards. In 267-270 these Elouri took part together with Goths and other eastern European peoples in two massive raids into Roman provinces in the Balkans and Aegean Sea, attacking not only by land, but notably also by sea. The equation of these "ELuRi" with the "ERuLi" was made by several Byzantine authors, and is still widely accepted although some scholars such as Ellegård consider this equation uncertain, and propose that the Heruli homeland lay elsewhere. For example, because a group of 6th century Heruli moved from the Danube to Scandinavia, some scholars believe that the Heruli had their earliest origins in Scandinavia. There are also proposals that there were Heruli kingdoms in several parts of Europe, already in the 3rd and 4th century, perhaps with common origins in the north. One proposal, based upon indirect evidence, is that there was a "Western Heruli" settlement based near the Lower Rhine, because in 286 AD, only a few years after the eastern raids, the Heruli were defeated in an attack on Roman Gaul.
