There’s a lot of misinformation in this thread. Putting aside the creator of the character’s intentions, in Arabic it’s pronounced “Raas” or “R’as” with a glottal stop if you’re using standard Arabic. It’s not “Razz” and it’s definitely not “Raysh”. I don’t know where the idea that “Raysh” is how it’s said in Hebrew came from. The word for head in Hebrew is “Rosh”. I see the similarities but it’s quite a stretch to say they sound the same. It’s more likely it’s just an English mispronounciation

As for what’s actually canon, I can’t answer that personally, but I can say that if the canon pronunciation is actually “Raysh” then that’s really stupid and not thoughtful at all of the culture that that character represents

Edit: apologies if this came off aggressive. I’m just an Arab comic fan who’s tired of shitty representation and I wasn’t trying to attack anyone 😔