To CathyGietl,
In case you are still looking I have information on a Thomas Dunn (not sure if it is the same or not - no "e"), In his military records he claims to be born in Braganstown, Louth, Ireland - in about 1832.
He died in August 1869 - but not in Ireland- rather in Nevada, USA.
I only know about him between 1861 and 1869 and would really like to find his parents or family. It sounds like you may have done a bit of research into the Thomas Dunne/Dunn of that place and time so I would enjoy any insight you could also give me.
Regards,