Someone just asked about who reynardine was, so I refreshed this thread.

My own research into this song has shown that many of the claims about it (eg that Lloyd learned it from Tom Cook) are incorrect. Lloyd himself wrote that he had put his version together from two Irish ones. One of them was certainly Campbell's, and Lloyd changed "his eyes so bright did shine" to "his teeth did brightly shine." Lloyd also recorded two distinct versions of it, one of which did not include this line! Shirley Collins's version followed Lloyd's early recording, while Fairport and most others followed his later one.

It seems certainly to have been most popular in America; authenticated traces of it in English oral tradition are extremely rare, though of course it was published on broadsides on both sides of the Atlantic and both sides of the Irish sea.

My own theory as to the name's origin is that "Reynoldyn" was a traditional name for an outlaw much like "Robin Hood." There was, in fact, a piece of late medieval marginalia that listed members of Robin Hood's band, and included Reynoldyn--the only name in the poem that scholars have not identified with a well-known character of the later ballads. It may be that Reynardine is a late offshoot of this Reynoldyn tradition--as indeed, may be Vulpius's Itialian outlaw Rinaldo Rinaldini. But this is mostly speculation.

What is pretty clear is that Reynardine is not supernatural in most versions of the song, or in the minds of most singers outside of a revival context.

I have more to say on this (I'm working on an article about the song), but maybe I'll shut up now!

Anyway, I hope this satisfies anyone who needs info on this song.