Gallows Humor

Talk to some of the members of the Brotherhood of Steel atfer gaining entry to the Citadel. They will tell you about a betting pool to try and guess Gallow's real name. You can ask Knight Captain Gallows about it after hearing about the bet. If your speech skill is high enough you can convince Gallows to tell you his real name. This mini-quest can be done up until the march of the robot to the purifier during the main story line. The Reward is 1000 Caps.