Translation according to P. W. Joyce:
Barnahallia in Galway; Bearna-haille, gap of the cliff. See Aill. H prefixed to allia, see [reproduced below] p. 4, X.
H is prefixed to a fem. Noun beginning with a vowel, when that noun is in the gen. singular preceded by na, the article. Baurnahulla in Cork, anglicised from Barr-na-hulaidh [-hully], the hill-top of the uladh, or altar-tomb, which in the name appears as hulla, not ulla.