I searched the Irish Family History Foundation's database. It contains 11,500,000 surviving rcds for abt 60% of Irish counties. Rcds B4 1840 are sparse.
For George Lloyd M 1812 +/- 4 yrs, I found 3 M rcds: 1809 Tipperary, 1812 Limerick, and 1812 Longford.
For Ann Wilson ditto, I found 3 M rcds: 1812 Longford, 1813 Kilkenny, and 1814 Armagh.
The 1812 Longford rcds are a match. Searching in more detail at the parish level, I found both M rcds occurred in Templemichael parish. These are likely your ancestors. A view of either detailed rcd should confirm the marriage was to each other. The rcd SHOULD also list the parents' names, residence, etc.
Google the Foundation's name to lead you to this database. Pls post the results of your search to my genforum msg.