Dunno if it was mentioned but allegedly the new lore book mentions that Mamool Ja originate from a landmass to the south and that they practice Blue Magic. Also near that landmass is Thavanair, which is a middle eastern style desert island. That being said, I wouldn't be surprised to see the FFXI themed Blue Mage appear in FFXIV. Hopefully that's the case, because FFXI's Blue Mage was the best incarnation of BLU in the entire series. They were silent and mysterious, they could fade in and out of space, they absorbed the essence of creatures they fought but always had an internal struggle within them to sort out the energy of the various beasts' souls they harbored within (with the help of their AF armor). When BLUs couldn't contain the beasts within they went berserk and turned into Soulflayers too. Overall, a really cool job.