Ober, Anna (m. Zimmerman) 
Ocker, Minnie (m. Barry) 
Ocker, Thomas & Ann (née Silver) 
Ogan, Katie (m. Perkins) 
Ogan, Peter 
Ogg, Elias 
O'Kane, Charley C. 
O'Kane, Edward T. 
O'Kane, James 
O'Kane, (Prof) T. C. 
O'Kane, Tullius Clinton 
O'Kane, William Eaton 
Olds, (Dr) Abner 
Olds, (Rev) Benjamin 
Olds, Benjamin 
Olds, Chauncey 
Olds, Henry 
Olds, James 
Olds, (Maj) James 
Olds, Jane 
Olds, John
Olds, Lester 
Olds, Luther 
Olds, Mame 
Olds, Mary 
Olds, Miles 
Olds, Sanford 
Olds, Walter 
Olds, W. Floyd 
Oliphant, Ephraim 
Oliphant, Mary A. (m. Hicklen; m. Jackson) 
Oliver, Minerva 
Oliver, Samantha 
Oliver, William & Annis 
O'Neall, (Judge) J. W. 
Onion, Thomas 
Orahood, Jacob 
Orcut, Monroe 
Osborn, Byron H. 
Osborn, C. F. 
Osborn, Clarinda 
Osborn, Daniel 
Osborn, David 
Osborn, David G. 
Osborn, Delano 
Osborn, Douglas B. 
Osborn, Edwin 
Osborn, Ella (m. Harris) 
Osborn, George 
Osborn, James M. 
Osborn, Jeanne R.
Osborn, John 
Osborn, John 
Osborn, John H. 
Osborn, Johnnie 
Osborn, Laduskey E. 
Osborn, Lucy J. (m. Riley) 
Osborn, (Mrs) Lydia (née Wood) 
Osborn, Marietta (née Phillips) 
Osborn, Mary (m. Benedict) 
Osborn, Mary 
Osborn, Mary J. 
Osborn, Melinda O. (m. Jackson) 
Osborn, Rose L. 
Osborn, Samuel C. 
Osborn, Sarah 
Osborn, Thomas 
Osborn, Thomas E. 
Osborn, Thomas  & Olive (née Manning) 
Osborn, Walter V. 
Osborn, William N. 
Osborn, William N. 
Ossing, Charles F. 
Ousey, Edward & Ann 
Ousey, Emma 
Ousey, James Jr. 
Ousey, James Sr. 
Ovelman, Hiram 
Owens, (Mr)