FRISII, in Ancient Geography, a German tribe forming part of the nation of the Ingeveones. Their country extended along the sea-coast from the mouth of the Rhine to that of the Amisia or Ems, and extended inland as far as the territory of the Brueteri. They were divided into the Frisii Majores who occupied the district that corresponds with the modern provinces of West Friesland and Groningen, and Frisii Minores, whose territory is represented by the present provinces of Oberyssel, Guelders, Utrecht, and the greater portion of the province of Holland. The Frisii were separated from the Batavi by the Rhine, and by the Amisia from the Chauci. The Frisii were at first firm friends and allies of the Romans, and such they continued till A.D. 28, when, enraged by the tyrannical conduct of the Roman lieutenant Olennius, they rose in arms against them, and compelled them to evacuate the country with great loss. Corbulo, the general of Claudius, reduced them to a kind of sullen obedience in A.D. 47; and Nero compelled them to abandon some conquests they had made on the southern side of the Zuyder Zee. In the fourth and fifth centuries they appear as members of the great Saxon Confederacy, and assisted the Angles and Saxons in their conquest of Britain. In the eighth century, Epir, the father of Charlemagne, wrested from the Frisii the western portion of their territory, and Charlemagne incorporated the Eastern part among his other Saxon conquests.