[rvogler]

Well, first of all LaTeX is derived from TeX. And the X isn't an x but the Greek letter X whose pronunciation seems to depend on Greek epoch and also geographic preferences. The final say would have Donald Knuth. I think he said it's like the Ch in (Happy) Chanukka ...

[drivingmenuts]

And again, a case where the creator could have done everyone a favor and not given it an obscure name that only an academic (and probably not many of those) would be able to pronounce correctly.