Here is a great site to check out: http://irishhereandthere.yolasite.com Ballina records.
Also, had great success looking on WorldVitalRecords.com and typing in Munnelly - 62 Ellis Island records for Munnelly (and I didn't even try spelling variants). Lots of info - esp on the later records - including their relative and address in Ireland, and the relative and address for where they were going in the US. A couple of them were going to Archbald. Good luck! Kathy