TaNaK, TaNaKh, Ketuvim, Kethuvim, Kh from the Kethuvim or no?

[Jacob]

Is the h in TaNaKh from the h in Kethuvim?

I say TaNaK and Ketuvim, but I do not remember or know how I have come to this.

Thank you for your help.

Shalom.

Jacob