It's wonderful to hear about your interest in uncovering your Irish heritage!
To delve deeper into your grandfather's family history, I suggest searching for his name in the civil records available through the General Register Office
and the National Archives
. Here's also a link
that offers additional ressources and information.
Another option worth exploring is reaching out to county-based genealogy centers. Specifically, you can find the County Cork center on the Roots Ireland website
. It might be an idea to contact them in advance to arrange a meeting with a genealogist, especially if you're planning a future trip.
Let us know how your quest for ancestral knowledge goes or if there's anything you'd like to know about County Cork!