Authors
Karl Oberste-Brink (Ob.-Brink) fl. 1914
Jiří Obrhel (Obrhel) *1933 - †1996
Dorothy Z. Oehler (D.Z.Oehler) fl. 1978
Takeshi (Takashi) Ohsawa (Tak.Ohsawa) fl. 1989
Naiara C. Oliveira (Oliveira)
Eduardo B. Olivero fl. 2018
M.S. Onyike (Onyike)
Stanislav Opluštil (Opluštil) *1962
Emanuel Opravil (Opravil) *1933 - †2005
Olga A. Orlova (O.A.Orlova) fl. 2019
Berlaine Ortega-Flores (Ortega-Flores)
Erika Lourdes Ortiz Martinez (Ort.Mart.) fl. 2024
Alexei A. Oskolski (Oskolski) *1962
Peter Osterloff (Ost.) fl. 2018
Ernst von Otto (E.Otto) *1799 - †1863
Eduardo Guillermo Ottone (Ottone)
Shu Ouyang (S.Ouyang) fl. 2018
Bernard Owens (B.Owens) *1938 - †2019
Elizabeth L. O’Leary (E.O’Leary) fl. 2010