A couple of comments

a) "THE" traditional one - surely there are more, if you include the Musgrave versions (mostly UK, whereas Matty tends to be USA?)

b) "THE" chords? There are usually many alternative possibilites for a tune, none of which can be called THE only RIGHT one.

(I used to sing Nic Jones's (totally different) version to keep me awake when driving at night, but that's thread creep)