Dear Chris, could Honora Moriarty have been from Tralee? Well it's not entirely beyond the bonds of possibility but records for that time frame are so patchy I would be slow to assume that the Tralee Honora is your Honora. I once found a Kilkenny man married to a Kerry woman. We discovered later that he drove a Bianconi coach and that is how he ended up in Kerry. But that was quite exceptional.
I would be very interested in the Moriarty people, John and Johannah who were Margaret Meehan's godparents. It is some time since I did any research in the Pallasgren/Templebredon, Co. Limerick area but I seem to remember that we solved a major brick wall when we looked in the records of the adjoining Co. Tipperary parish of Solohead.The family had only moved a mile up the road but they then came under the jurisdiction of a Co. Tipperary RC Parish. We find this too for people from the North Kerry/Limerick border whose records are in Limerick although they lived in Kerry.
My internet is slow tonight so I cannot access nli.ie which has some microfiche of church records. If you haven't checked this resource yet I would suggest that you do that and look for additional children and/or townlands which might assist you further. https://registers.nli.ie/parishes/0279
Failing that, an autosomal DNA test is the only thing that would confirm the connection with your Moriarty ancestors homeplace.
I hope you find this helpful Chris and not disheartening.
PS do let us know how you get on