Constant reminder: God didn't make the Chantyman from a handful of clay c.1800. He evolved. The era under discussion has centuries of Roman Catholic maritime culture replaced wholesale with the secular/Protestant equivalent, book burnings and all.

Sailor's Society for Stella Maris; “two-six-heave” and Let the Bulgine Run in for Salve Regina; chantyman for chanter, celeuste &c. Afaik Catholic sailors weren't all that welcome again in Martha's Vineyard environs until the early 20th century.

So if you're shooting for any logic, order or uniformity, past, present or future, for Acadia, Nantucket, Texas and California chanty application, pronunciation or spelling fuggedaboudit.

Lastly & pedantly, the so-called low, mean or crude end of the chanson scale would, methinks, traditionally come from the provençal minstrel or “chanterre” (cantores, cantatores, canteour &c) not “polite society's” psalm chanters.