Driscoll of Cashelisky, Sowney Clonakilty, Ronan and Donovan of Ardfield and Rathbarry Parish

I have recently found my GGG grandparents were Cornelius Ronan and Mary Donovan whose first child, JNO, was born in the Ardfield and Rathbarry parish in 1825.  Then they left for London.  Their daughter, Johanna (known as Hannah) married John Driscoll in Rotherhithe in 1860 although they lived in Deptford nearby.  I believe John was the son of Timothy Driscoll and Margaret Sowney (Lowney in mistranscribed records) who could be from Cashelisky in Clonakilty.  Timothy was dead by 1851 when Margaret was found as a widow with 3 children, John (b 1840), Helena (b 1843) and Mary (b 1846).  Margaret was sharing a house with a Jeremiah McCarty, a second-hand dealer.  

I am from NZ and my immediate family are all deceased.  I have been trying to prove my family and their places in West Cork.  I have a lot of DNA matches to Donovan's of the Rosscarbary area, and Driscoll's of Clonakilty and Baltimore.  I will be back next year to try and further my knowledge.  I have been to the Ronan House in Dunowen and to the grave there, but still I have to link Cornelius.  He was a Journeyman Carpenter in London and could have been employed at 'New Mill' in Ardfield area.  I am curious about this.   

I suspect that, although these Driscoll's and Sowney's show up in Clonakilty area they may have come from further over on Sheepshead Peninsula or further judging by DNA.  Any assistance, no matter how vague, would be very much appreciated.  Thanks.