Hi Joe,
If you know the Parish some of these family members might have lived in then it would be worth checking Griffith's valuation for records of them in the 1850s --> http://www.askaboutireland.ie/griffith-valuation/index.xml?action=nameS…
I also recommend you keep an eye on the Historic Graves website. This is a resource of digitised graveyards around the island of Ireland. The Beara peninsula, where your family appear to be from, has yet to be surveyed, but the database is always being added to so check back a couple of times per year. From the drop down bar on the home page you can either search by map of Ireland or click explore and select name to search by surname (the link is below). Zoom in on an area of interest, click a graveyard, scroll down and you can read the headstone inscriptions. Keep in mind too that only legible headstones have been added, so if you can't see a name of interest it does not necessarily mean they are not buried there. It's also good to cross check with other records where possible.
Link here: https://historicgraves.com/
Finally, I would recommend you get in contact with West Cork Historical Society. They may know local history experts or people with an interest in the history of local names. There websites are below:
https://northoltgrange.wordpress.com/
https://www.facebook.com/historyireland2016/
I hope some of this information is helpful. Good luck in your search!
Dave
