William O'Neal may refer to:
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William O'Neal (informant) (1949–1990), American FBI informant
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William O'Neal Lockridge (1947–2011), American political activist
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William R. O'Neal (1864–1946) American lawyer and businessman
See also
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William O'Neil (disambiguation)
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William O'Neill (disambiguation)
{{hndis, Oneal, William