William O'Neill
Appearance
The name William O'Neill (or O'Neil) may refer to:
- William O'Neill (Connecticut politician), Governor of Connecticut in the 1980s and early 1990s.
- William O'Neill (Ohio jurist), appellate judge and 2008 candidate for U.S. Representative from Ohio's 14th congressional district
- William O'Neil, an entrepreneur and stockbroker who founded the newspaper Investor's Business Daily
- C. William O'Neill, a Governor of Ohio
- Bucky O'Neill (1860-1898), US Army officer killed at the Battle of San Juan Hill