Nilotic al-Ourouba was the probable home of the Zensunni, the Misr, before some or many settled on Poritrin. Nilotic al-Ourrouba is likely refering to the name of a location on old Terra encompassing the areas of Egypt, the Nile Valley and maybe some of north Africa and the middle east and or near east.
Behind the scenes
Nilotic and Nilote (also spelled Nilot) derive from the Nile Valley, specifically the Upper Nile and its tributaries, where most Sudanese Nilo-Saharan-speaking people live.