The Greuthungs, Greuthungi, or Greutungi were a Gothic people of the Black Sea steppes in the third and fourth centuries. They had close contacts with the Thervingi, another Gothic people from west of the river Dnestr. They may be the same people as the later Ostrogoths.
"Greuthungi" may mean "steppe dwellers" or "people of the pebbly coasts". The root greut- is probably related to the Old English greot, meaning "gravel, grit, earth" Polish grunt land, role, earth This is supported by evidence that geographic descriptors were commonly used to distinguish people living north of the Black Sea both before and after Gothic settlement there and by the lack of evidence for an earlier date for the name pair Tervingi-Greuthungi than the late third century. It is also possible that the name "Greuthungi" has pre-Pontic Scandinavian origins. It may mean "rock people", to distinguish the Ostrogoths from the Gauts (in what is today Sweden).Jordanes does refer to an Evagreotingi (Greuthung island) in Scandza, but this may be legend. It has also been suggested that it may be related to certain place names in Poland, but this has met with little support.