The Veliocasses or Velocasses (Gaulish: *Weliocassēs) were a Belgic or Gallic tribe of the La Tène and Roman periods, dwelling in the south of modern Seine-Maritime and in the north of Eure.
[6][7] The second etymology is semantically more probable for a tribal name, but the unknown length of the vowel e in uelio- makes it difficult to conclude with certainty.
[6][8] The meaning of the second element -casses, attested in other Gaulish ethnonyms such as Bodiocasses, Durocasses, Sucasses, Tricasses, or Viducasses, has been debated, but it probably signifies '(curly) hair, hairstyle' (cf.
[11] The Veliocasses occupied territory primarily north of the lower Sequana (Seine) river, with a smaller portion extending south of it.
[12] During the pre-Roman period, their capital was probably the oppidum of Camp de Calidou (near Caudebec), then Rotomagus (present-day Rouen) after the reign of Augustus (27 BC–14 AD).