Full Name	Born	Died
(unknown)
Florence B.S. O'Connor
Helen O'Connor
Juanita O'Connor	1901	1959
Jean O'Grady
Margaret O'Grady
Margaret O'Hara	1855	1940
Melita O'Hara	1899	1978
Myra O'Neil
Rose Cecil O'Neill
Velma Frances O'Neill
May O'Regan
Anna O'Reilly
Margaret O'Reilly
Hilda Diana Oakeley
Edith Oakley
Katie Oatway
Marie C. Oemler
Mary Gould Ogilvie
Maud Ogilvy	1864	1935
Old-Fashioned Girl (pseud.)
Selina Olive
Marjorie Oliver
Evangeline Ben Ollet
Louise Olnby
Marion Beatrice Olshewski	1917	1998
Betty Orchard
Charlotte Ormond
Frances Ormond
Helen Orpwood
Jane Osborn
Margot Osborn	1902	2006
Ethel Lindsay Osborne	1877
Jane Osborne
Marian Francis Osborne	1871	1931
Amy Oskley
Eleanor Sharpe Osteen
Martha Ostenso	1900	1963
Marianne Otty
Catherine Owen
Glyn Owen
Isabella A. Owen
Martha Owen
Martina Garnder Owen
Mrs. A.M. Owen
Catherine Owens
Villda Sauvage Owens
Elizabeth Agnes Page	1828	1905
P.K. Page	1916	2010
Patricia Page	1915	2014