ORIGIACUM(Ὀριγιακόν). Ptolemy (Ptol. 2.9.7) makes this town the chief place of the Atribatii or Atrebates in Belgica. There is nothing that fixes the position of Origiacum except its resemblance to the name Orchies, which Cluver suggested. Orchiesis between Douayand Tournay, and appears to be beyond the limits of the Atrebates, whose chief town in Caesar's time was Nemetacum ( Arras).
[G.L]