http://homepages.rootsweb.ancestry.com/~aherns/ahnews.htm lists two Larkin O'Herns in the news. One is Lewis Larkin O'Hern of Salt Lake City, Utah in 1957-58. The other is Lewis Larkin O'Hern, III, wounded in Afghanistan 2011.
Dennis Ahern [no relation]
Ahern Family website
http://homepages.rootsweb.ancestry.com/~aherns/