Dennis J. O’Callaghan American virologist, cancer dead at age 85
Dennis J. O'Callaghan, an American virologist, immunologist and biochemist,
died on March 30, 2026. He was born in New Orleans, Louisiana, on July 26, 1940, and earned a B.S. in…
Named O'Callaghan
6 obituaries for famous people named O'Callaghan. See who they were, when they died, and read their memorial pages.
Michael O’Callaghan
American activist and politician
Died on Thursday June 19th 2025
Sean O’Callaghan
Irish IRA commander
Died on Thursday August 24th 2017
Gary O’Callaghan
American radio broadcaster
Died on Saturday August 19th 2017
Owen O’Callaghan
Irish property developer
Died on Tuesday January 24th 2017
William O’Callaghan
Irish Army Lieutenant General
Died on Saturday December 26th 2015