This piece requires a little explanation.
After I played Cataclysm and got some experience with Homeworld 1 I thought about other races that might have been on the exile path separate from the Exiles. What if they landed elsewhere and a separate group of Hiigaran refugees started on their way home? Except, somehow, they landed on a more temperate world and retained their technological prowess?
These guys were never named, but I could believe that such an event happened between Cataclysm's events and Homeworld 2.