Diane,
My apologies for a slow reply.
When I posted above, I mentioned James Rogan, his father Bartholomew Rogan, and Nancy Rogan (nee Kearney) - James's wife.
Here are dates we are aware of for all three:
James Rogan
birth - 15 Jan 1808 - County Mayo, Ireland
death - 11 Nov 1880 - Ashippun, Dodge County, Wisconsin, USA
wedding to Nancy -1838, Ireland
Naturalization Registration (possible) - 30 Jan 1851, Boston, MA, USA
Children - Katherine, Martin, Michael, Bartholomew, Mary, Margaret, James Jr, Anthony B, Nellie
Bartholomew Rogan
birth - abt. 1785, County Mayo, Ireland
death - unknown
children - James (1808), Anthony (1810)
Nancy Rogan (nee Kearney)
birth - 24 April, 1818, Killala, County Mayo, Ireland
death - 24 Sep 1880 - Ashippun, Dodge County, Wisconsin, USA
wedding to James - 1838, Ireland
Let us know if this allows you to make some connections. We are always happy to talk more and discuss possible connections. Our biggest questions go back to Ireland - Bartholomew's wife, where did they live when James was born, any other family further back than Bartholomew, etc.
Thanks,
-Pete Rogan
rogan.pete@gmail.com