I stopped watching Lost = one less fannish Jack to worry about. How many is it up to now? Other than Lost's Jack, there are Jack O'Neill, Jack Bauer, Jack Bristow, Jack Sparrow, Jack Harkness, and I'm sure I'm missing some.
Thank God there isn't a Jack in Heroes. Well, there is Zach, but not quite the same. Unless the Haitian turned out to be named Jack. Or Jacques.
I bet the latter will turn out to be Claude Rains' real name.
Well, there was a Jackie.
How about derivations on William?
Jack Carter
Jack Crichton
The Jackalope
(fast as fast can be, you'll never catch me-eeee!)
How about Jack Logan William Linderman?
Maybe Alex Jack Logan William Linderman...
Alex Jack Logan Sam William Linderman.
I am amused that y'all are alphabetizing the names.