I think the only one he'd really know is Oliver, who is an Auror and on the anti-BOMB task force. Glinda was one of the BOMB members arrested, so he probably knows who she is at this point, too. Bree was four years behind him in school and I don't see him knowing Kasia or Alex, either. I'm up for anything plotwise, though! You can IM me at itwillhavelena or email me at lenabee@me.com