Wikipedia
Sexovii
The Sexovii are classified as a Celtic tribe. They lived in Gaul in present-day northwestern France and are discussed as Celts or Gauls. The Romans referred to them along with other tribes as Armoricans, that is, tribes living between the Seine and Loire near the Atlantic Ocean in the region of Armorica (roughly present-day Brittany and eastern Normandy), occupied by forces under Julius Caesar in 55 BCE.