Alot of the times the Jewish holiday is spelled with an "H" but sometimes with a "CH".  But why the difference?  The answer is quite easy.  The word Hanukkah begins with a hebrew sound that does not exist in the english language.  This sound is also similar in the German sound "Ach".  This German likeness that warrants it being spelled with the "CH", because of the Jews of Central or Eastern European descent.  It is also very common for Israelis to use this spelling.  As the word was commonly miss read Americans started to spell it with an "H" instead of the "CH".

Make sure to use both words when listing items!!!!!  ALWAYS!!!!   If you go with one spelling while disregarding another will be a mistake.  Regardless of what the package may say or the spelling being different always list with both words.  Make sure though, in your description, to let them know what is written on the box or packaging so not to receive unhappy customers. So, if you plan on reaching the maximum number of customers include both Hanukkah and Chanukah in your title lines!!!!

It make be warrant to even us some common spelling variants that are less common: Hanuka, Hanukah, Hannuka, Hannukah Channuka, Chanukka, Channukkah, Chanukkah.