1) Historical Celtic people 2) Tribe of pre-Roman Gaul 
The Segusiavi (`Victorious ones`) were a Celtic tribe of Gaul, whose fortress was located at Lugdunum (modern Lyons). The name `Segusiavi` may have been an alternative name of the `Segobriges` who were legendarily involved with Greeks in pre-Roman Gaul and the foundation myth of Massalia. ...