I had a quick look, the only one that came up for me was not in Co. Meath, but matches in other respects:
Elisabeth Hoey bapt 13 Mar 1846 at St Paul's Arran Quay, Dublin, parents Michael Hoey and Elisabeth Keenan, sponsors Thomas Meledy and Rose Smyth.
Could this be the one? By the way I checked for and did not find any other children born to this couple.
Michael.