I just tried the link "Bell" and it works. The following appeared in "Early Ballads Illustrative of History," pg. 134. It says:

                         LORD LOVEL

This popular ballad is believed to be ancient. Mr. J.H. Dixon informs me that he has seen a black-letter copy of it, of about the date of Charles II. Another version, taken down from recitation, is published in Kinloch's Ancient Scottish Ballads. It was reprinted in London, in 1846, from an old broadside; and included in a collection of Ancient Poems published by the Percy Society in the same year. The hero was, in all probability, one of the Loveles or Delavalles of Northumberland, celebrated in Chevy Chase; and the ballad may be presumed to be of Border origin. This conjecture is strengthened by the fact that it was written to the tune of Johnnie o'Cockelsmuir.

I think the above is all BS, a big joke by the Percy Society. LL is not a Northumbrian ballad. Looks to me like it was they who assigned the happy tune of of Johnnie o'Cockelsmuir. And this version is undoubtedly the classic one.

Charles II reigned from 1630-1685. I have stated before that I believe it was written in the aftermath of the Jacobite risings of 1689. Perhaps they know something, but they are not communicating it straightforwardly.