I think the Orange and the Green is probably a 20th century composition. So looking for information on Mudcat, I see that the lyrics are by Tony Murphy from the Liverpool area. Tony died in 2017 in his early 80s.

https://mudcat.org/thread.cfm?threadid=80905

https://mudcat.org/thread.cfm?threadid=16809

But Michael-O should be able to find songs with similar themes, such as The Ould Orange Flute, originating nearer to the time his project focusses on.