The short answer is if any of your parents, or grandparents were born in
Ireland (or Northern
Ireland) you can apply for Irish Citizenship.
You must send off original birth certificates for yourself, parent and grandparent (if your parent was not born in
Ireland). Irish certificates are ordered from Dublin. The entire process is very inexpensive considering all of the benefits. I think I had rec'd my Irish passport about 6 months after starting the process. Contact the Irish Embassy in Ottawa.
Regards,
SW1392