One etymology derives víking from the feminine vík, meaning "creek, inlet, small bay". Various theories have been offered that the word viking may be derived from the name of the historical Norwegian district of Víkin, meaning "a person from Víkin". According to this theory, the word originally referred to persons from this area, and it is only in the last few centuries that it has taken on the broader sense of early medieval Scandinavians in general. However, there are a few major problems with this theory. People from the Viken area were not called "Viking" in Old Norse manuscripts, but are referred to as víkverir, ('Vík dwellers'). In addition, that explanation could explain only the masculine (víkingr) and not the feminine (víking), which is a serious problem because the masculine is easily derived from the feminine but hardly the other way around.
The form also occurs as a personal name on some Swedish runestones. The stone of Tóki víking (Sm 10) was raised in memory of a local man named Tóki who got the name Tóki víking (Toki the Viking), presumably because of his activities as a Viking. The Gårdstånga Stone (DR 330) uses the phrase "ÞeR drængaR waRu wiða unesiR i wikingu" (These men where well known i Viking), referring to the stone's dedicatees as Vikings. The Västra Strö 1 Runestone has an inscription in memory of a Björn, who was killed when "i viking". In Sweden there is a locality known since the Middle Ages as Vikingstad. The Bro Stone (U 617) was raised in memory of Assur who is said to have protected the land from Vikings (SaR vaR vikinga vorðr með Gæiti). There is little indication of any negative connotation in the term before the end of the Viking Age.
Another etymology that gained support in the early twenty-first century, derives Viking from the same root as Old Norse vika, f. 'sea mile', originally 'the distance between two shifts of rowers', from the root *weik or *wîk, as in the Proto-Germanic verb *wîkan, 'to recede'. This is found in the Proto-Nordic verb *wikan, 'to turn', similar to Old Icelandic víkja (ýkva, víkva) 'to move, to turn', with well-attested nautical usages. Linguistically, this theory is better attested, and the term most likely predates the use of the sail by the Germanic peoples of North-Western Europe, because the Old Frisian spelling shows that the word was pronounced with a palatal k and thus in all probability existed in North-Western Germanic before that palatalisation happened, that is, in the 5th century or before (in the western branch).
In that case, the idea behind it seems to be that the tired rower moves aside for the rested rower on the thwart when he relieves him. The Old Norse feminine víking (as in the phrase fara í víking) may originally have been a sea journey characterised by the shifting of rowers, i.e. a long-distance sea journey, because in the pre-sail era, the shifting of rowers would distinguish long-distance sea journeys. A víkingr (the masculine) would then originally have been a participant on a sea journey characterised by the shifting of rowers. In that case, the word Viking was not originally connected to Scandinavian seafarers but assumed this meaning when the Scandinavians begun to dominate the seas.
In Old English, the word wicing appears first in the Anglo-Saxon poem, Widsith, which probably dates from the 9th century. In Old English, and in the history of the archbishops of Hamburg-Bremen written by Adam of Bremen in about 1070, the term generally referred to Scandinavian pirates or raiders. As in the Old Norse usages, the term is not employed as a name for any people or culture in general. The word does not occur in any preserved Middle English texts. One theory made by the Icelander Örnolfur Kristjansson is that the key to the origins of the word is "wicinga cynn" in Widsith, referring to the people or the race living in Jórvík (York, in the ninth century under control by Norsemen), Jór-Wicings (note, however, that this is not the origin of Jórvík).
The word Viking was introduced into Modern English during the 18th-century Viking revival, at which point it acquired romanticised heroic overtones of "barbarian warrior" or noble savage. During the 20th century, the meaning of the term was expanded to refer to not only seaborne raiders from Scandinavia and other places settled by them (like Iceland and the Faroe Islands), but also any member of the culture that produced said raiders during the period from the late 8th to the mid-11th centuries, or more loosely from about 700 to as late as about 1100. As an adjective, the word is used to refer to ideas, phenomena, or artefacts connected with those people and their cultural life, producing expressions like Viking age, Viking culture, Viking art, Viking religion, Viking ship and so on.
Europe in 814. Roslagen
is located along the coast of the northern tip of the pink area marked "Swedes and Goths"
The Vikings were known as Ascomanni ("ashmen") by the Germans for the ash wood of their boats, Dubgail and Finngail ( "dark and fair foreigners") by the Irish, Lochlannach ("lake person") by the Gaels and Dene (Dane) by the Anglo-Saxons.
The Slavs, the Arabs and the Byzantines knew them as the Rus' or Rhōs, probably derived from various uses of rōþs-, "related to rowing", or derived from the area of Roslagen in east-central Sweden, where most of the Vikings who visited the Slavic lands came from. Some archaeologists and historians of today believe that these Scandinavian settlements in the Slavic lands played a significant role in the formation of the Kievan Rus' federation, and hence the names and early states of Russia and Belarus. The modern day name for Sweden in several neighbouring countries is possibly derived from rōþs-, Rootsi in Estonian and Ruotsi in Finnish.
The Slavs and the Byzantines also called them Varangians (Russian: варяги, from Old Norse Væringjar, meaning 'sworn men', from vàr- "confidence, vow of fealty", related to Old English wær "agreement, treaty, promise", Old High German wara "faithfulness"). Scandinavian bodyguards of the Byzantine emperors were known as the Varangian Guard.
The Franks normally called them Northmen or Danes, while for the English they were generally known as Danes or heathen and the Irish knew them as pagans or gentiles.
Anglo-Scandinavian is an academic term referring to the people, and archaeological and historical periods during the 8th to 13th centuries in which there was migration to—and occupation of—the British Isles by Scandinavian peoples generally known in English as Vikings. It is used in distinction from Anglo-Saxon. Similar terms exist for other areas, such as Hiberno-Norse for Ireland and Scotland.