It looks like his son Thomas took over the family farm in Lisnalanniv at some point. I'm assuming Thomas senior died there and hadn't moved away.
Sources
Marriage record for Thomas Roche & Ellen O'Neill has their fathers names on it.
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DNA Connections
It may be possible to confirm family relationships with Thomas by comparing test results with other carriers of his Y-chromosome or his mother's mitochondrial DNA.
However, there are no known yDNA or mtDNA test-takers in his direct paternal or maternal line.
It is likely that these autosomal DNA test-takers will share some percentage of DNA with Thomas: