Trying to find information on a Charles O'Neill Esq., of Clonkeen, I believe in County Cork. His daughter Anne, who died in 1805, married my 5th great-grandfather Hugh O'Neill of the Feeva.
Also on a Bernard O'Neill, born in Ballygrooby and Dunmore, died in Anaghmore, whose daughter Mary married Felix Cunnigham O'Neill of The Feeva (1788-1858).
Also on a John O'Neill Esq., of Muinterevelin, County Tyrone, whose daughter Mary married Bernard, above.
Also on a Hugh Duff O'Neill, who was a Captain in one of the regiments at the Battle of the Boyne, I have found listings in both the Earl of Antrim's and Lord Bellew's regiments for Captain Hugh O'Neill but not sure which one is Hugh Duff, whose daughter Mary (1691-1791) married my 6th great-grandfather Charles Dubh O'Neill of the Feeva, who died in 1777, and had Hugh O'Neill, mentioned in the second line.
By find information I mean which line of O'Neills they would descend from, or even just more info about where the O'Neills of Cork came from. There is a book called the O'Neills of County Cork and Their Descendants from 1666-1998, not sure if anyone has it, may have info on Charles of Clonkeen.