It's a name to conjure with, for sure: Aradia.
It's thoroughly in keeping with the irony-laden history of the modern Craft that one of the most common names for the Goddess of Witches should derive ultimately from the name of a first-century member of the Judaean royal house.
Well, it's a long story. (I'll tell it to you some time. If you don't already know and want to find out, you can do so here. Scroll down for the good stuff.)
No, my purpose today is much simpler: stress. Is it a-RA-di-a or a-ra-DI-a?