Hi Tina,
Searching for family members can be both tricky and rewarding at the same time!
There is some excellent resource information here on the community with our
Helpful Research Tips post. Please have a look and see if any of the details help you with your search.
The best place to start is always with the paper trail of birth, marriage and death certificates. Then, particular to the island of Ireland, is the date of 1864 when civil registration was introduced in Ireland, all records before this date are held in the counties so you would need to know the location.
If you would like to post the information details here, maybe one of our fellow members or industry partners would be able to assist with some more information too.
We hope this helps and look forward to hearing some more about your grandfather.
Speak soon,
Martin