Hi John
I am a descendant of the Guerin's; not sure where they're from, but the name of Corofin, Clare has come up. My ancestor is Michael Guerin bc 1810 who emigrated to Australia with his wife and infant daughter Bridget in 1840.
Have you done any DNA testing? This would be a quick way to tell if we're related.
Mine is on both familytreedna and getmatch, as well as my trees back to Michael Guerin.
Cheers,
Scharyn.