I am not sure of your organization/notation. Are ALL of your listings for the surname McKeon?
The parish of Drumshanbro has three sects/districts: CofI, Methodist, and Civil district.
Note - B/M/D registration was civil after 1863. Civil rcds are kept by the General Register Office. Contact this office at http://www.groireland.iehttp://www.groireland.ie. The info found on civil rcds is more comprehensive and more consistently collected than that for church authorities.
Suggest you google "Irish Family History Foundation" to lead you to an online database of geneological records for abt 65% of Ireland.
For Elizabeth McKeown B 1889 +/- 1 yr with a father named Bernard in Drumshanbo, Leitrin , I found 1 B rcd for 1890.
For Thomas McKeown B ditto, I found 1 B rcd in 1891.
For Alice McKeown B 1895 ditto, I found 0 B rcds.
For Mary Ann McKeown B 1866 ditto, I found 1 B rcd: 1866.
For Catherine B 1870 ditto, I found 1 B rcd: 1870.
For Mary B 1861 +/- 1 yr with a father named William in Murhaun RC parish, Leitrim, I found 1 B rcd: 1861.
For Andrew B 1864 +/- 1 yr with a father named Francis in Leitrim, I found 1 B rcd: 1864.
For Michael B 1866 ditto, I found 2 B rcds in 1866: one church, the other civil.
For John Patrick B 1868 ditto, I found 2 B rcds in 1868 ditto.
For Ann B 1869 ditto, I found 2 B rcds in 1869, ditto.
For Terence B 1873 ditto, I found 2 B rcds in 1873, ditto.
For Patrick B 1893 ditto, I found 1 B rcd in 1893.
By now you should be able to do these searches by yourself.
Google the Foundation's name to lead you to this database. Pls post your search results to my genforum msg.