I actually like the spelling "Jayme" for Jamie. I "had" a stray cat that I took care of for a couple months and that was his name.
What drives me absolutely crazy is when it doesn't even look like the same name. For example:
Megan. Or Meghan. Both normal.
The craziest one I have EVER seen is this:
Meagheanne.
WUT!?
This reminds me of this Brian Regan sketch. Sooo funny: