O BROIN Liam, *1944 (Ireland (Éire))
O' DOWD Gwen, *1957 (Ireland (Éire))
O' KEEFE Paul, *1957 (Ireland (Éire))
Attributed to O'LYNCH Karl van Town, 1869-1942 (Austria)
O' MCAVOY Harold, 1891-1977 (Canada)
Ó MURCHADHA Domhnall, 1914-1991 (Ireland (Éire))
O' NEILL ROSINOL Juan, 1828-1907 (Spain)
O'SULLIVAN Michael, 20 > 21
OAKES John Wright, 1820-1887 (United Kingdom)
OAKES Minnie F., 19 > 20 (USA)
OAKES W., 19 >
OAKLAND Vehicles
OAKLEY H. C.
OAKLEY Octavius, 1800-1867 (United Kingdom)
OAKLEY Thornton, 1881-1953 (USA)
OAKLEY Violet, 1874-1960 (USA)
OAKLEY Alfred James, 1880-1959
OAKLEY Agnes, ¥1866
Attribued OAKLEY Octavius, 1800-1867 (France)
OAKLEY Charles, *1925 (United Kingdom)
OAKLEY George, 20 > (Ireland (Éire))
OATES William (United Kingdom)
OATES Bennett, *1928 (United Kingdom)
OATES Daniel, *1964 (USA)
OATS Ian R., act. ca 1881
OBACH Kaspar (Caspar), 1807-1868 (Switzerland)
OBADIA Dominique, 20 > 21
OBAL Piotr, 1900-1987 (Poland)
O'BANION Nance, *1949 (USA)
OBAS Charles, 1927-1969 (Haiti)
OBATA Chiura, 1885-1975 (Japan / USA)
OBEL Nils, *1937
OBÉNICHE D., 20 >
OBER Artemi, 1843-1917 (Russia)
OBER Hermann, 1920-1997 (Germany)