Saxon once meant coastal raiders north of the Rhine
Before Saxony was a Carolingian stem duchy in 804, Roman writers used Saxon for seaborne attackers much as later ages said Viking. The name is traditionally tied to the seax knife, and it still labels German regions long after a distinct people dissolved.
Writers sometimes call them the Old Saxons or Continental Saxons: a Germanic-speaking population of early medieval Antiqua Saxonia in what is now northern Germany. Their political story stays murky until the eighth century, when semi-legendary Widukind faced Charlemagne; they seem not to have been tightly united until the generations of fighting that ended in Frankish conquest and the 804 stem duchy. Neighbors likewise spoke West Germanic dialects across a crowded frontier.
Long before Saxony meant a clear state, Saxon named coastal raiders striking the Roman Empire from north of the Rhine, a usage later ages would echo with Viking. Those early raiders and settlers mixed with Frisians, Angles, and others who crossed into imperial lands and, eventually, Britain. A disputed second-century line in Ptolemy may mention Saxones near the lower Elbe—or Axones in most manuscripts—so any classical tribe north of the river mouth remains debated. The oldest firm listing after Ptolemy is the Laterculus Veronensis of about 314 AD, which names Saxons among peoples beyond the frontier. Rome's Saxon Shore, a chain of nine forts, ringed the south-eastern corner of England, and an inscription at Stobi in North Macedonia hails Count Theodosius as the terror of Saxony, the earliest reference to a Saxon country.
Today German Saxons are not a separate ethnicity or country, yet the name survives in Lower Saxony and other states covering much of the old duchy. Their speech fed Low German, once a major Baltic trade tongue. Eighth-century writers such as Bede distinguished continental Old Saxons from the English kingdoms that also claimed Saxon identity, because England itself was sometimes written as the Saxon homeland. A single ethnonym thus stretched from knife, to pirate, to province.
Source: Saxons