As OTW said, the most complete resource for notable members is the organization webpage.
Yes and no, if HQ doesn't post their names on the public site and you don't know their maiden name, then someone "famous" might not be found out so easily.
I'm more impressed when initiated member continue to be active as much as they can.
I'm definitely not impressed when someone pointedly doesn't want to be reminded they initiated. Unfortunately, it's frowned about hit them over the head with whatever they signed.