Silus

 is a member of Caesar's Legion captured during battle and brought to to Camp McCarran in 2281.

Background
Silus was an centurion in Ceasars Legion. But during an NCR attack which he lost he didn't commit suicide like normal legionares would, but decided he could escape captivity without revealing any information about Ceasars plans. The player can try to interrogate him at Camp McCarren during an unmarked side quest.

Appearances
appears in Fallout: New Vegas.