Petrocorii

The Petrocorii were a Gallic tribe dwelling in the present-day Périgord region, between the Dordogne and Vézère rivers, during the Iron Age and the Roman period.

It derives from the Gaulish stem petru- ('four') attached to corios ('army'), after a Gallic custom of including numbers in tribal names (e.g. Vo-contii, Vo-corii, Tri-corii, Suess-iones).

[6][7] Their name may indicate a relatively recent formation emerging from the union of fragmented small ethnic groups.

[12][13] Their territory was located south of the Lemovices and Santones, east of the Bituriges Vivisci, west of the Arverni, and north of the Nitiobroges and Cadurci.

[5] In 52 BC, they supplied around 5,000 warriors to Vercingetorix, to aid him to fight the Roman legions of Julius Caesar.