The Angrivarii are a Germanic tribe of the early Roman Empire mentioned briefly in Ptolemy as the Angriouarroi, which transliterates into Latin Angrivari.

They are believed to be the source of the eighth century identity, Angrarii, which is one of three subdivisions of Saxony (the others were Westfalahi and Ostfalahi).

The name appears earliest in the Annales and Germania of Tacitus as Angrivarii.In post-classical times the name of the people have a number of different spellings in addition to the ones just mentioned: Angarii, Aggeri, Aggerimenses, Angerienses, Angri, Angeri.

They live in a district called Angria, Angaria, Angeriensis, Aggerimensis and Engaria.They live in Engern, a region west of the Weser river not far from Teutoburg Forest, and also (probably by extension) in Angeron of Münster.

Ancient Engern is a much larger district than today's community, comprising most of the country surrounding the middle Weser, including both flat land, as around Minden, and low hills (Holzminden).

It becomes part of today's Westphalia.