Robrenn's Orcs
by Marc SaindonSeeing that Orcs approriate or imitate rival nations to build their own culture, Robrenn's Gallic culture would on the long run develop a sort celtic Orc, analogous to mythological Formorians (little of Gallic mythology survives outside Asterix albums).
(Image from: https://www.deviantart.com/volante-icaro/art/Irish-orc-and-Red-hood-193812467)
One way to distinguish Carnax Orcs (easterners) and Cassivelonis Orcs (westerners) is perhaps loyalty to Hule.
Carnax Orcs possibly have forsaken their loyalty to the Master of Hule, gaining instead sponsorship of the Unseelie Court and the Feydark (providing additional muscle when the portals to Good Kingdom open from Autumn Equinox to Spring Equinox at the Mounds of Ligona).
Whereas the Cassivelonis Orcs at times receive reinforcements, ressources, and orders from Hule.
The Goblins pay lip service to Hule when convenient and shift allegiances when it's not.
(Image from: https://www.deviantart.com/lorandesore/art/Orc-733640636)