Welcome grandpasearch1
With only a little information we can often still find out much about our ancestors however you may need just a little more than a name, father's name and approx. birth year, especially with a common name.
Can I suggest than you start a specific topic on the Ireland board giving all the information that you have and we can start from there to help you to search.
e.g. include religion, how you are aware of he having siblings and their suspected names etc.
I'll have a look now and see if I can see anything initially for you