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Overton, Julie Minot. Ohio Towns and Townships to 1900: A Location Guide. Edited by Kay Ballantyne Hudson and Sunda Anderson Peters. Mansfield, OH: Ohio Genealogical Society, 2000.
Owen, E. A. Pioneer Sketches of Long Point Settlement, or Norfolk's Foundation Builders and Their Family Genealogies. Toronto: William Briggs, 1898.
The Oxford Dictionary of the Christian Church. Edited by F. L. Cross and E. A. Livingstone. 3rd ed. New York: Oxford University Press, 1997.
Oxford English Dictionary. Compact ed. 2 vols. Oxford: Oxford University Press, 1971.
The Oxford English Dictionary. Edited by James A. H. Murray, Henry Bradley, W. A. Craigie, and C. T. Onions. 12 vols. 1933. Reprint, Oxford: Oxford University Press, 1970.