I wonder whether some of the comments refer to Nollaig's sister Áine, who lives in or has lived in California. I saw Nollaig performing in at a couple of events in Belfast and in Derry Northern Ireland not so long before things shut down due to the pandemic. Now that venues are opening up again, here is a video of Nollaig aka Nodlaig Brolly playing and singing in Co Derry this year, 2022.
https://www.youtube.com/watch?v=fEzaV9s4a_U