Interesting thread. Several of the Azami worlds ended up in the Republic of the Sphere. I wonder if the Dark Age would provide an avenue for a RoTS Arkab Legion?
When I visited a WK site and read the info on the RoTS worlds, they simply cut and paste earlier, published data on the Arkab Worlds. This was prior to the post-Jihad Azami Brotherhood timeline, so nobody bothered to take any steps to flesh out that sub-faction. Later information says at least four major Azami worlds joined the RoTS while Arkab and Algedi remained allies to the DC, the four Azami Legions made it clear that they would
independently respond to any persecution of Azami people, within DC or RoTS borders.
It would make sense for the RoTS to raise planetary militia defense units for the Azami Worlds within their borders, and this was RoTS policy, although battlemechs were limited to one or two per planet. Stone seemed to make it policy to prevent ethnic strife by reducing the emphasis on cultures, although the Northwind Highlanders makes a significant exception to that policy, being one of the few independent, culture/region based units fielded, outside of RoTS regulars.
Post-RoTS would open up more freedom for the Arkab to expand, but that is to be seen. When I first generated my Azami character, I would never have guessed that a barely-mentioned group would eventually become its own faction in the game.