[spoil]As stated in Chapter 565 "God Like You," his name is YWHW (pronounced Yahweh) which is apparently the true name of God, according to Judaism. I was given to Yhwach due to his ability to give out fragments of his soul whoch gave people what they lacked. The name is obviously meant to reference just how god-like this power is. In typical fashion, making YWHW pronouncable for the Japanese language, a bit of change gas to made leading to the corrupted Yhwach (pronounced like you-walk) for both easyness to say and resemblence to the source word.Also, Yhwach is such a dumb name!
Why could the English translation have just been Juhabach?
At least then anyone would know how to properly pronounce the name.
It makes perfect sense really.[/spoil]