every rather than just about every modern rendition is derived from Nic Jones

Indeed yes.

And every rendition that sets it in 'Harking' (wherever that is) instead of 'Buchan' copied it from Mary Black's mishearing of Nic Jones' recording on Noah's Ark Trap and which Loreena McKennit copied.

However the text of Child #239 Lord Saltoun & Auchanachie begins:

Auchanachie Gordon is bonny and braw.