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The Kilfian RC records are only available for 1826-1844 (1826-1836 for baptisms) http://registers.nli.ie/parishes/0749 I checked on Roots Ireland and was not able to find the marriage record. I looked at one of the baptismal records and it showed Breaffy as the townland and I'm wondering if the townland was either Breaghwyanteean or Breaghwyanurlaur both in Kilfian parish.
The 1855/1856 Griffiths Valuation head of household listing for Kilfian parish shows a Francis Farrell in Breaghwyanteean and possibly that is the 1828 Francis.
The 1901 census shows two Farrell families in Breaghwyanteean possibly sons of the 1828 Francis.