This is cross-posted from r/asklinguistics, with influence from Wiktionary's Tea Room.
So I'm bundling up three questions regarding the PGmc. proper noun *Auziwandilaz.
First: The /w/ in the descendants of this name are described in the Wiktionary Tea Room entry as follows:
*Auziwandilaz yields forms with -w-, as in ON Aurvandil, Lombardic Auriwandalo, but contrast OE Earendel, OHG Orentil and, perhaps most puzzlingly, Gothic auzandil.
How can this be explained? (The Tea Room entry also asks about PGmc. *Audawakraz, which shows a similar double development.)
Second: Is there any evidence for the first element being a stand-alone word? There's a consensus for it being a descendant of PIE *h₂ews-, but nothing about it in Proto-Germanic besides the name. I've asked around and gotten answers involving cranberry morphemes but not much else.
Third: This last one's on the hypothetical linguistics side of things. I've recently learned of a Mediaeval Latin borrowing descending from the root in question, namely Horiwandilus. How would this borrowing evolve on the path to modern-day Romance? I'd also like to know how English would borrow this descendant form (and if it would displace the native Earendel).