Hi OP,
I asked the same/ similar question on here before. I try to find the link later for you.
Bottom line is: there is no entitlement to Paternity Leave in Ireland. There is an entitlement to Parental Leave but it's not the same scheme. Paternity Leave is down to employers discretion and varies from employer to employer. My employer for example gives two weeks paid Paternity Leave while my friend's only gives 3 days. I also heard from other people that they get nothing. So best thing to do is check your company's handbook/ policy.