Have you the marriage record of your Michael Callaghan?
Your first posted that his father was Eugene and now you think Thomas that's a big jump?
Picking random Michael Callaghan's wont work i am afraid. All the post are getting very confusing and need some logic about the research. And i mean this is a nice way.
What you need to do is get as much solid information about your Michael Callaghan that you can be 100% sure of.
1. His Death record does this list his parents? In UK and Ireland it wont probably. But in US and Australia/NZ it should?
2. His marriage record must at least list his father's name usually if not the mother's also, depending on what place he married. Also Church record will have different information to Civil Registration Records. have you exhausted all these areas?
3. Other information his will, ship manifest, grave, occupation of father on wedding cert etc can all help
4. Children's names can prove major hints to past generations!
Its important to work back from what you know.
Otherwise you could spend years picking random Michael Callaghan's.
If you cant be sure of anything on his generation maybe his children generation will be the one to work on first. So we are fully sure who Michael Callaghan wife's name was.
Otherwise
If you are 100% sure that your Michael Callaghan married Julia Gerrard you need to order their marriage from
www.groireland.ie using the below information. The form is not designed for all this information but include it where you can. And leave blank or put N/A the PPS and other fields that are not relevant.
Michael Callaghan and Julia Gerrard
Registration District: Navan
Year and Quarter: Jan-Mar 1898
Volume 2 Page 794
This is the only way to move forward this research. As this record will give father's names and other solid information.
Ger