My great-grandfather, James Cullen, was born in the townland of Eskermore in the parish of Philipstown in 1836 (another name for the parish is Daingean), As you may know already, the parish of Killeigh adjoins Daingean to the south. The online parish records for Killeigh only go back to 1844, but you may be able to find a couple of those children there. A few records in Daingean go back to 1796, but otherwise there are gaps in the period you want (at least for Christopher). I was lucky enough to find my great-great-grandfather's baptismal record there in 1796, and you might be able to find your ancestor as well, given the dates involved. You can find the records here and download them for future use:
I compared our DNA kits at GEDMATCH, and we are at least distantly related. With the threshold lowered to 3 cM, we had some 61 cM of total match, but al in small segments (the largest being 5 cM). The small segments would normally indicate a distant repationship, but I've never had so many small segments of match with someone before and with such a hight total of match, without at least having one long segment as well. Not sure what it means, but here are the results, without the comparison at each chromosone, because that is displaying oddly at GEDMATCH right now:
Comparing Kit A306167 (*grayfox) [Migration - F2 - A] and T780556 (Kevin Jewell) [Migration - F2 - T]
Segment threshold size will be adjusted dynamically between 200 and 400 SNPs
Minimum segment cM to be included in total = 3.0 cM
Mismatch-bunching Limit will be adjusted dynamically to 60 percent of the segment threshold size for any given segment.
Largest segment = 5.0 cM
Total Half-Match segments (HIR) = 61.7 cM (1.719 Pct)
17 shared segments found for this comparison.
416265 SNPs used for this comparison.
52.763 Pct SNPs are full identical
I've had a number of matches with people who have the surname Fox in their ancestry, and in fact there were several Foxes who were sponsors at baptisms of people in my family in Offaly, but the Fox surname is also commmon in a few other places, especially Mayo, where two of my grandparents grrew up. Several Irish surnames were anglicized as Fox, including Mac Shanaghy in Mayo (Mac [an] Seanchaidhe in Irish, meaning "son of the storyteller"), through mistranslation and confusion with the word "sionnach" ("fox"). Some of the Fox's in Mayo are, however, descended from the O'Kearney (Ó Catharnaigh) family which originated in Meath, which is said to have acquired the name Fox because the head of the family long ago was known as "The Fox". I think the Offaly Fox's come from that family, but some of them may also have been Mac Shanaghy's.