Tell Us about These Sheehans

I know a bit about Cindy Sheehan the anti -war activist, but who can tell me something about the following living Sheehans of some fame?
Billy Sheehan, an America rock bassist.
Bobby Sheehan, and American rock bassist!
Casey Sheehan, an American soldier. Related to Cindy?
Edward R. F. Sheehan, American journalist, diplomat, and novelist.
Fran Sheehan, America rock bassist!!
Frank Sheehan, a Canadian politician.
Helena Sheehan, American-born Irish academic and former nun.
James J. Sheehan, an American historian.
James Michael Sheehan, an Australian politician.
Michael Jarboe Sheehan, the current archbishop of the Roman Catholic Archdiocese of Santa Fe.
Michael Jerome Sheehan, U. S. Naval Public Affairs Officer, former crew member of Mystery Science Theater.
William F. Sheehan, an America politition.
Neil Sheehan, a Pulitzer Prize-winning American journalist.

Who else can we add to this list of live fame?