Flanagan and Beatty family Kilbride, Roscommon

I am looking for information about my Flanagan ancestors from Kilbride, Roscommon Ireland. I have located the following ancestors from this region but they then moved to Burnley, Lancashire, England and then to New Bedford, Massachusetts. These are the only people I can find in Ireland and can not locate any ancestors prior to 1800. I have been advised that the records may not exist but thought in would reach out to those more knowledgeable. 
Edward Flanagan born about 1800- married Mary Beatty born about 1801 Kilbride, died 1864 Burnley, Lancashire England.Their children: 

Bridget Flanagan(1821-1882),  James Flanagan (6 Jul 1823, Kilbride-1881), Ann Flanagan ( 1829-1850),Hannah Flanagan b1830, Thomas Flanagan (b 1833) and Martin Flanagan b 6 Oct 1835 in Kilbride, Roscommon. Martin is the only one young enough to have a baptism record as Roman Catholic , Kilbride parish,Roscommon. Mary and the children all were born in Ireland but died in  England. I can't find a death record from Edward. Is there any way to find prior generations of Flanagan and Beatty's in Roscommon or do the records simply not exist? Any guidance would be greatly appreciated!