Thanks for your reply. Great hearing from you. In the Griffith's Valuation (c. 1848) there is a John & Patrick CORCORAN living in Skerry - presumably with families. In the 1901 Census there are LOTS of Corcorans in Skerry - John & Margaret have a large family of nine children; there is also Matthew Corcoran & family and a Daniel Corcoran & family. You can check them out if you Google Irish+Census+1901 - it's free. You can also check them out in the 1911 Census. There are still Corcorans in the Rosenallis area - I'm sure they're connected.
To my knowledge, the McEvoys got the Cosby farm because they (McEvoys) were connected by mariage, but the Cosby line itself in that area died out. I'm sure Timmy or his cousin David McEvoy will put you right on that story when you come to Ireland this summer. It appears (at the moment) that our side of the McEvoys are not directly connected with Timmy & David.