Translation according to P. W. Joyce:
Corraneena in Galway; Cor-an-fhiona, round hill of the wine. The f of fion, wine, falls out by aspiration : p. 2, IV [reproduced below]. Name, an echo of the old time of smuggling.
IV. F aspirated loses its sound altogether and drops out. Barranarran, in Mayo, represents the Irish Barr-an-fhearainn, the top or highest part (barr) of the fearann or land, where f vanishes.