It wasn't Touring the Stars, but LinkNet and it named all five: Jardine, Gabriel, Taussen, Obeedah, Mayadi. The problem is: "We do not even know if these are their actual names, or if the Cabal pulled another bait-and-switch as they had when Jardine became Herakleione and then “died.â€"
Also mentioned:
- a rumor that Stone's people found one of the remaining three during the war and covered it up;
- a suggestion in the data files that the Combine world was dead even before the Jihad, the victim of one of its own products