Quadi

Good Morning, everybody,

I watch the discussions on here with great interest, and I hope you
don't mind me asking one little question [that might lead to hundreds
of other little questions if you are willing to humour me!].

I'd like to ask if there is an accepted or even halfway decent
etymology for the Germanic tribe of the Quadi? What would this word
sound like without the Latin transliteration?

And, indeed, is there for all the other Germanic tribes?! I would be
delighted if anyone here could point me in the direction of a
comprehensive list of attempts to analyse ancient German onomastica
[preferably online, though that may be a little too much to ask!].

Yours
Ben McGarr