John Grenham's work is terrific https://www.johngrenham.com/.  He has just launched maps showing RC baptisms for every parish where our name is involved.  Go to https://www.johngrenham.com/findasurname.php?surname=O%27Donoghue and then click on the new tab on lefthand side under Maps

 

John Grenham's work is terrific https://www.johngrenham.com/.  He has just launched maps showing RC baptisms for every parish where our name is involved.  Go to https://www.johngrenham.com/findasurname.php?surname=O%27Donoghue and then click on the new tab on lefthand side under Maps