User blog comment:Mejiaj1/Origin of Usernames/@comment-3424593-20131006034027/@comment-7418318-20131006085629

Now Hah-dis? If you want it to sound german (or Greek for that matter) try Hah-dehs. That comes quite close I think.

Or since you seem to be familiar with japanese pronouciation ハデス (Ha de su), which gives you the exact way that Hades is pronounced in german (as long as you remember to mute the u at the end obviously).

''Damn... my knowledge about Katakana sucks... I with they'd abolish it and go with Hiragana only^^''