It could be that there is an actual source for the name "Barrel Pirate", and I just haven't been able to find it. In this case, I would appreciate if someone can point me to it!
Or it could just be that it's a fan-made term that got so widely used no one every thought of questioning its authenticity. Which would be slightly problematic, since RayWiki is such a reference for all things Rayman that it has been known to create feedback loops.
So, in the absence of any additional information, I would suggest "barril con patas" as a main name, and maybe mention "Pirata Barril" as an alternative name (e.g. "Los barriles con patas, también conocidos como Piratas Barril, son [...]").




