77 people start with letter o

• O'Brien, Sarah Jane
• O'Bryan, Mortimer
• O'Byron, James
• O'Donohoe, Timothy
• O'Neale, Charles
• O'Neale, Mary
• O'Neale, William
• O'Neill, Charles
• Oakley, Anthony
• Oakley, Betty
• Oakley, Eliza
• Oakley, James
• Oakley, John
• Oakley, Lucy
• Oakley, Lucy
• Oakley, Margaret
• Oakley, Mary Ann
• Oakley, Michael
• Oakley, Sarah
• Oakley, Thomas
• Ober, David
• Ober, Emily
• Ober, Francis Washington
• Ober, Henry
• Ober, Jane
• Ober, Margaret
• Ober, Robert
• Ober, Thomas
• Ober, William
• Oden, Betsey
• Offut, William M.
• Offutt
• Offutt, Thomas
• Offutt, Thomas, Jr.
• Offutt, Zadock
• Ogay, Jacob
• Ogden, Moses
• Ogden, Thomas
• Ogle, Benjamin
• Ogleton, Rezin
• Oliver, E. Washington
• Onion, John Barrett
• Ord, James
• Orm, John
• Orme, Jeremiah
• Orme, Jeremiah
• Orme, Rezin
• Orme, Thomas
• Orme, W. C.
• Orme, William C.