Educational magazines
- O'Neill, Dorothy P.
- O'Neill, Eugene (Gladstone) 1888-1953
- O'Neill, Heather
- O'neill, J(erry) M. 1921-1999
- O'Neill, Jamie 1962-
- O'Neill, Joseph 1964-
- O'Neill, Kevin M. 1953-
- O'Neill, Molly
- O'Neill, Paul 1963-
- O'neill, Susan 1947-
- O'Neill, Tom 1961-
- O'Neill-White, Siobhán (Siobhán O'Neill)
- O'Reilley, Mary Rose
- O'Riordan, Michelle
- O'Rourke, Edmund N., Jr. 1923-
- O'Rourke, Meghan 1976-
- O'rourke, P.J. 1947–
- O'Rourke, Sally Smith
- O'Shaughnessy, Andrew Jackson
- O'Shaughnessy, Brian 1925-