Hi Sean,
I can see from Griffith's valuation that there were Lynes in Castleisland Parish around 1850 and plenty of Connors in Tralee and Castleisland during that time period -- http://www.askaboutireland.ie/griffith-valuation/index.xml?action=nameSe...
Griffiths also lists family members so by cross referencing with your own data you may be able to expand your family tree.
It also might be worth getting in touch with Castleisland Culture and Heritage Society - http://www.gokerry.ie/castleisland-culture-and-heritage-society/ and Keryy Archaeologicaland Historical Society https://www.kerryhistory.ie/ . They will have local experts who may be able to help in your quest.
Good luck!
David