Hi John I went to Ballynacargy last year and got my hands on some of the registers. You might have this info by now. There is a lot more but I still have to transcribe all of it.
Gerald Condron married Marcella Leavy 12 Nov 1859 - she was bapt. 30 January 1838. 2nd marriage Bridget Maquire she was bapt. 5 Aug 1842.
John Condron married Anne Leavy 28 Nov 1863 I haven't found Mary Anne yet. (There were some damaged pages here. I have your William as ELLEN Condron bapt. Aug 1866 the Witnesses were Edward Lynch and Mary Weir - but I can't find a William. Eliza - Elizabeth Condronb. 3 Dec 1868 bapt. 4 Dec 1868. at Sonne, Ballynacargy .
I see there are other Condrons - would you like me to send what I have on them? Regards Shani (In cold South Africa)