I dug up names of McCabe and other close to Comey, based on Comey's answers to Feinstein where he gave titles instead of names. I knew every one of those people (Comey's inner circle) was likely a rat, so was expecting certain names to surface - Rybicki, Baker, McCabe. Same process works just viewing deeper in the chain of command.
COMEY: As I said in response to Senator Feinstein's question, deputy director, my chief of staff, general counsel, the deputy director's chief counsel, and then, more often than not, the number three person at the FBI, who is the associate deputy director, and then, quite often, the head of the national security branch.Deputy Director = Andrew McCabe
http://heavy.com/news/2017/06/jim-rybick-fbi-chief-of-staff-biography-james-comey/ Reportedly Told Comey That He Doesn't Fully Trust Jeff Sessions
General Counsel = James Baker
https://www.vox.com/policy-and-politics/2017/6/7/15751336/fbi-trump-russia-comey-trump-flynn Names McCabe, Rybicki, and Baker as confidantes
http://nymag.com/daily/intelligencer/2017/06/3-fbi-officials-can-support-comeys-account-of-trump-meeting.html All four of them had reservations about doing so because they did not fully trust Attorney General Jeff Sessions -- and because the events were unprecedented in their experience.
Deputy Director's Chief Counsel =
Associate Deputy Director = David L. Bowdich
Head of National Security Branch = Carl Ghattas as of Feb 28, 2017
Do any of these initials match that long list of initials that Q posted ?
AM JR JB DB CG