Rhoutikleioi

The Rugii, also Rugians, Rygir, Ulmerugi, or Holmrygir (Norwegian: Rugiere, German: Rugier) were an East Germanic tribe who migrated from southwest Norway to Pomerania around 100 AD, and from there to the Danube River valley. They were allies of Attila until his death in 453, and settled in what is now Austria after the defeat of the Huns at Nedao in 453.

The tribal name "Rugii" or "Rygir" is a derivate of the Old Norse term for rye, rugr, and is thus translated "rye eaters" or "rye farmers".Holmrygir and Ulmerugi are both translated as "island Rugii".

Uncertain and disputed is the association of the Rugii with the name of the isle of Rügen and the tribe of the Rugini. Though some scholars suggested that the Rugii passed their name to the isle of Rügen in modern Northeast Germany, other scholars presented alternative hypotheses of Rügen's etymology associating the name to the mediaeval Rani (Rujani) tribe.

The Rugini were only mentioned once, in a list of Germanic tribes still to be Christianised drawn up by the English monk Bede (Beda venerabilis) in his Historia ecclesiastica of the early 8th century. Whether the Rugini were remnants of the Rugii is speculative. Despite the identification by Bede as Germanic, some scholars have attempted to link the Rugini with the Rani.

The Rugii had possibly migrated from southwest Norway to Pomerania in the 1st century AD.Rogaland or Rygjafylke is a region (fylke) in south west Norway. Rogaland translates "Land of the Rygir" (Rugii), the transition of rygir to roga is sufficiently explained with the general linguistic transitions of the Norse language. Scholars suggest a migration either of Rogaland Rugii to the southern Baltic coast, the other way around, or an original homeland on the islands of Denmark in between these two regions. None of these theories is so far backed by archaeological evidence. Another theory suggests that the name of one of the two groups was adapted by the other one later without any significant migration taking place. Scholars regard it as very unlikely that the name was invented twice.

...
Wikipedia