There is a similar Appalachian folk song that has a melody similar to Mariah. It's based on "The Devil's Nine Questions" in which the chorus has a similar phrase, "Sing ninety-nine and ninety".

Lowe was a sophisticated musician who had an illustrious career in different fields as I recall as a riding instructor. His attempt was to create a generic "Western" song not unlike Dvorak's "Going Home" theme used in the New World Symphony.

It does not sound like any song from Holland that I've ever heard. They usually have truncated phrases that reflect the highly articulated stocatto language with songs in a martial or march tempo and waltzes. More Germanic sounding than Celtic.

Frank