Hi, I am not a researcher , I just like helping if I can. Just Post on here as you have don't use Paddy Coyle name because other researchers might think you were working with him and if he is away they will leave message for him.
Just put Clonvadadog Parish looking for Cornelius Coyle born 1823 to 1828, I woud say 1820 to 1830 myself. Left Donegal for USA in 1851.
I saw records that you have on Family Search but nothing on the irish site some are pd. sites so the researchers can help you there.
I will send a note to Paddy maybe he can help you before July.