Feasgar math, a Ghobnait.
I'm no expert on Irish, but "Fand" in Old Irish becomes "Fann" in modern
Irish, and "Túatha Dé Danann" in Old Irish probably should be "Tuatha Dé
Danann" in modern Irish. "Danann," unless I am very much mistaken, is the
genitive of "Danu," whereas "Danaan" is a misspelling, or perhaps an
anglicisation (?). I could be wrong about the modern form, but I'm pretty
sure "Túatha Dé Danann" is Old Irish. Everything else looks ok to me (the
ones I was unsure of --- Aireamh and Éadaoin --- were checked in MacKillop's
_Dictionary of Celtic Mythology_).