Billy Koenig (Earth-199999)

S.H.I.E.L.D. Agent Billy Koenig was the identical brother of the late Agent Eric Koenig. Like his brother, Billy was placed in charge of one of Director Nick Fury's secret bases, which he dubbed "The Playground." After Fury put Agent Phil Coulson in charge of rebuilding S.H.I.E.L.D. from scratch, he led Coulson to the Playground where he would start his mission. Koenig was there to welcome them to their new base of operations, although they all at first confused him for Eric.^[2]

• Patton Oswalt portrays Agent Billy Koenig in the Marvel's Agents of S.H.I.E.L.D. episodes "Beginning of the End" and "Shadows." Oswalt also portrayed Billy's brothers Eric, Sam, and Thurston, as well as their grandfather in an alternate timeline, Ernest Koenig.
• Triplett notes that Koenig mentions a number of brothers by different names.^[2]