298. French, German, Eqyptian or Moroccan?

There are multiple theories about the origin of this term. The Oxford English Dictionary mentions three probable theories:

• the word is derived from the combination of the French for "yes" and the German for "yes"
• inventor Charles Kennard claimed it to be an Ancient Egyptian word meaning "good luck"
• the word was inspired by the name of a Moroccan city

Which term?