Koch (read the profile for the reference) is one last name that always gives us trouble (Fischer is the other). Could be Jewish, could be German, could be Polish, could be Czech.
Our Office roster: Carell, B.J. Novak, Rashida Jones, and character Toby Flenderson. Will there be more? You bet. (We said Fischer above, right?)
In any case, Happy New Year, lansmen (and goyim too)!