Caramarie, I am related to Patrick Carroll who married B McEvoy of Ardgallagher. I cant add anything to your search for the McDevitt connection. However your relative Joe McEvoy still resides in the area and runs an oil distribution business-Roscommon Oil Distribution, at Lecarrow, Cuilmore, Strokestown. He may be able to help you.
Patrick Carroll was 27 years junior to his wife...see 1911 census. They had no family and the farm was left to Patrick's nephew (my grandfathers brother) -Dan Carroll who lived there for some years before moving with his family to Rhue , Kilmore. Anthony Carroll, Dan's son is very well versed in family history and conections. He still lives at Rhue, Kilmore. Dan also has a son a priest in Mississippi USA- Fr. Brian Carroll. Hope this helps