I'm also cringing a little bit to learn that the practice of misspelling words with a "K" is as old as the "Dumpster Kolector" from the 1940s.
Kraft might look like one, but isn't, it's named after James Kraft [5], which presumably traces back to the german word Kraft.
I'm curious if there are older examples.
[0]: https://en.wikipedia.org/wiki/Kotex [1]: https://en.wikipedia.org/wiki/Kleenex [2]: https://en.wikipedia.org/wiki/Kool-Aid [3]: https://en.wikipedia.org/wiki/Kool_(cigarette) [4]: https://en.wikipedia.org/wiki/Krispy_Kreme [5]: https://en.wikipedia.org/wiki/James_L._Kraft
I find them horrible cringeworthy, too. Names with letters pronounced phonetically (e.g. "EZ"), sound-alike vowels (e.g. "Lyft"), and substituted consonants (like the K for C) irritate me a lot. (I'm an angry pedant and I know it...)