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.