Veliocasses

The Celtic tribe of Veliocasses (also Velocasses or Velicasses ) controlled in pre-Roman Gaul large areas in Sequana Valley, including the Vexin, which is named after him. Consistent with Caesar's Commentarii de Bello Gallico were the Veliocasses part of the tribal alliance of the Belgae in the revolt in 52 BC against the Romans. This year they raised 3,000 men, in order to support Vercingetorix and fought on the side of the Bellovaci last uprising against the Roman hegemony.

Under Augustus they were part of Lugdunensis with the capital Rotomagus.

Pliny the Elder mentioned the Veliocasses in his Naturalis historia ( 4.18 ) and Claudius Ptolemy in his Oueneliokasioi