Hmmm, just thought of an elaboration on my earlier post:
I wonder whether it is a coincidence that, except for one letter, "Troy" is "York" spelled backward? (Perhaps "New Kroy" would just sound too weird...)
***buzzword alert***
[t] and [k] actually are very similar from a linguistics perspective. They have an identical manner of articulation: both are voiceless stops; i.e., in both cases the air temporarily stops flowing out of the mouth and in neither case do the vocal cords vibrate. They differ only in their place of articulation (in this case, the position of the tongue in the mouth when they are said).
***end buzzword alert***
Again, this may just be a coincidence; but I find it an interesting one.
cheers,
Lynn