I'm guessing the title of that song means something like "He is a handsome man?"
There were areas in Ireland I went to on my honeymoon where the natives spoke Irish as a first language.
An Irish colleague of mine told me that the natives would speak English to my wife and me, as we were American tourists, but that they would expect him to speak in Irish if he were there.
Just a guess based on words that resemble Latin and Scandinavian relatives of Gaelic (Latin being more closely related of course: vir / fir, tu / tu, -ix / -icus, etc.).... I once read that Julius Caesar, during the conquest of Gaul, ordered military dispatches to be drawn up in Greek, as the Gauls could intercept and make out the general gist of Latin.
Julie Fowlis - Hg Air A' Bhonaid Mhir, but I don't understand why there should be "celebrate" there after searching the online dictionaries.
"Húg" seems to remain a mistery then, unless it's a misspelling a "thúg", but it's unlikely. I have the original CD with the song and that's how the title is spelled. I know that "h" can be used sometimes at the beginning of a word in some cases, when the word starts with a vowel, as in "Óglaigh na hÉireann". But this doesn't seem to be the case here either, does it?