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Records for that RC parish don't begin until the 1830s so there will be no baptisms or marriages for anyone before that time. The name would have been quite numerous in the northern counties but not in Roscommon. There are no instances of that surname in the later Griffith's Valuation, for example 1847-1864.
It might be a good idea to keep an eye on the Early Birth and Marriage Index. It is updated regularly and if your ancestor doesn't appear now, they may in the future.
Feel free to add your ancestor's details to our XO Chronicles. You can learn more about it HERE and it might be another avenue to consider so that your ancestor's details can be seen by others.