possibly ballyvoghan, sealed up and crumbling

I've only tentatively identified this one as Ballyvoghan castle in Limerick, and since I can't find anything to either confirm or contradict that, I'll stick with it for the moment.

There are google listing for ballyvaughan in Clare, and Ballyvogan in Galway, neither of which seem to match this little ruined tower with the filled-in entrance, so I don't think I misidentified the county....