On Page 78 of "Chronicles of the Gatekeeper" is a section about a R-Series Astromech and that he calls sentinent beings "werrons" - which should give hints about his history...

has anybody a clue what its history and werrons could be?

Not werrons, Werron. I took it to be the name of the Jedi to which the astromech was assigned. I don't think there are any further mentions of that name in the adventure. It's a plot hook, not a detailed mystery.