>I have a Michael Thomas O'Hearn, born in Canada 1860, left Canada in 1890 for Minnesota and South Dakota.
http://homepages.rootsweb.ancestry.com/~aherns/ahminn.htm#de... lists a Michael Thomas O'Hearn deceased 22 May 1935 in Ramsey County, Minnesota.
Dennis Ahern [no relation]
Ahern family website
http://homepages.rootsweb.ancestry.com/~aherns