Hi, I must admit that I haven't followed this thread all the way through. But, I have been searching for a Judy Mackenna (not sure of the exact spelling for Mackenna). Judy Mackenna married a Connolly. Judy had a daughter Mary Connolly and she married my gg-grandfather Hugh O'Brien (many variations for the spelling of O'Brien). Hugh was born about 1833 to Patrick O'Brien and Mary (Coile) Coyle.
I know that Hugh O'Brien and Mary Connoly lived in Co. Monaghan and that my g-grandmother was born in Lisnalong around 1864.
I have been unable to trace Judy Mackenna and an hoping that someone, who is also searching for Mackenna may have some info.