This will shed (NPI) no light on the etymological question, but this seems like a good place to post the lyrics to a parody I wrote a couple of years ago.

A Chantey From Old Chanteytown

It's only a chantey from old Chanteytown;
Sing "Away You Santy" and "Blow the Man Down".
Where Haulaway Joe comes down to Hilo,
While Stormalong's drinkin' with Reuben Ranzo.

Shallow Brown, Heiland Laddie and Jack's in cahoots,
And so we will pay Paddy Doyle for his boots,
And with Boney we'll roll that old woodpile on down
To a chantey from old Chanteytown.

Jerry