The Frisians are a Germanic ethnic group native to the coastal parts of the Netherlands and Germany. They are concentrated in the Dutch provinces of Friesland and Groningen and, in Germany, East Frisia and North Frisia, that was a part of Denmark until 1864. They inhabit an area known as Frisia. The Frisian languages are still used by 500,000 speakers; dialects of Frisian are recognized as official languages in both the Netherlands and Germany. The ancient Frisii enter recorded history in the Roman account of Drusus' 12 BC war against the Rhine Germans and the Chauci. They occasionally appear in the accounts of Roman wars against the Germanic tribes of the region, up to and including the Revolt of the Batavi around 70 AD. They are not mentioned again until c. 296, when they were deported into Roman territory as laeti (i.e., Roman-era serfs).
Contributions by Khoikhoi, De728631, and Rokus01.