It seems like quite the journey of discovery for both of you, Danielle and Mike!
The Irish Genealogy
site is the main General Register Office of Ireland pages where after 1864 when civil registration was introduced in Ireland, we started seeing the formal registration of births, marriages, adoptions and deaths. A wonderful resource, even though you may find more Anne McManus's!
We hope that both of you continue with your research, please keep us up to date with your journey, we are all making it with you. :)