Which is Jewish - Hanukkah or Passover?

It's a Hebrew Word, and any English spelling is an attempt to capture the Hebrew pronunciation.
Nobody can say that one or another English spelling is right or wrong.

Here, I'll try to give the Hebrew pronunciation. If I succeed, then you can decide how best
to write it in English.

First, there's a little problem, because one of the sounds in the Hebrew Word doesn't exist in English.
It's the first sound in the Word, and it's the same mildly gutteral first sound in another Hebrew Word
that you might have run into ... "chutzpah", meaning audacity.

This sound is not made by clearing the chronic nasal drip from your bronchii. That's too gutteral !
The best way I know is the same technique our German teacher suggested in high school, to make
the same sound in German: Whisper the Word "key", and the sound of the first air that escapes
your throat as you whisper the 'k' is the sound you want.

That's the sound that begins the name of the upcoming Jewish holiday. I'll write that sound as 'kh'.

Now here's the name of the holiday, pronounced in Hebrew:

"KHAH-noo-kah".

Personally, however you'd like to write that Word in English will be fine with me.