Fleadhanna is simply the plural of fleadh, kat. If you search for fleadh in this forum you'll find previous threads about what it means and its pronunciation (rather than take over this thread).

Interesting points there Geoff- in my upbringing in Irish Catholic Liverpool, ceilis were Irish dances (often put on in parish halls by each parish) where everyone would know all the dances, so there was no caller. I learned a great deal about playing for dances in this way, particularly by playing the parish club's piano which hadn't been tuned for an age- I got good at transposing up a tone or a semitone. Problem came when it was 'in the crack'!

Later, probably in the mid 70s, we got asked to play for barn dances (PTAs, charity fundraisers etc) where people wouldn't know the dances, so we had a caller, and introduced simpler English and American dances along with the walls of Limerick and the waves of Tory. Funny thing was, dancers seemed to have the idea that barn dances were American, and would come dressed in check shirts, dungarees and straw hats... (NOT old ladies sipping tea!)