Well, it's quite a long story, and I'm sure it's nothing of what you would expect, but I'll tell you: It started with an account on a game named GunZ, when I was a kid. I wanted to be named "Shikamaru" as my favorite character in the anime "Naruto", but I couldn't, the name was in use, so I use shika-dsapo ("dsapo" being the result of smashing my hands to the keyboard). I started used that name in all my accounts everywhere, but then I needed to get an account name without the "-" so I used "shikadsapo". Most of my accounts still have that username, you can search it by google and get a lot of results. All the friends that I started meeting started calling me shikad, as a diminutive. At the hour of creating my account on funnyjunk I didn't want anyone to recognize me, so I used an anagram (a word created by using the same letters of another words in a diferent order), and the result was "Kadish", an anagram for "Shikad". I liked it, because it sounded arab-like (probably the cause of your question). And I am now using it, that's the story of my name, hope you enjoyed the read. inb4 tl;dr

Actually, that was very interesting.

You were almost right about the source of my question, as "Kaddish" is a term that applies to a few prayers in Judaism.

And I'm no stranger to the art of smashing my hands on a keyboard, my YouTube name is Ljoufhk.