So many Irish names are written down wrong for exactly that reason: someone wrote it down as they heard it. Depending on the accent it could be anything. A fave megalithic example - Magheraghanrush came from Mochra Con Ros.

The problem gets bad in counties such as Meath, where the Normans and then the English drove out (or killed) the local Irish population and so many of the Irish roots were lost. Worse still, many places were just renamed to something completely different (Ashbourne for example) and the original name was lost forever.