# Members of the Royal Netherlands Academy of Arts and Sciences (O)

The Royal Netherlands Academy of Arts and Sciences (Dutch: Koninklijke Nederlandse Akademie van Wetenschappen, abbreviated: KNAW) is an organization dedicated to the advancement of science and literature in the Netherlands. The academy is housed in the Trippenhuis in Amsterdam. Founded in 1808, members are appointed for life by co-optation.

## List of members (O)

| Name | Type | Division | Date of election | Notes |
| Heiko Augustinus Oberman | Corresponding Member | | 1963 | |
| Joseph-Denis Odevaere | | | 1816 | |
| Theo Odijk | Member | Natural Sciences and Engineering | 2008 | |
| Hans Oerlemans | Member | Natural Sciences and Engineering | 1994 | |
| Johannes Offerhaus | Member | | 1957 | |
| Werner Ogris | | | | |
| Heinrich Wilhelm Matthias Olbers | | | 1809 | |
| Hermann Oldenberg | Foreign Member | | 1919 | |
| Axel Olrik | Foreign Member | | 1914 | |
| Jean-Baptiste-Julien d' Omalius d’Halloy | | | 1816 | |
| Balthazar Paulus Ommeganck | | | 1816 | |
| Conrad Gerard Ontijd | | | 1809 | |
| Louis Onvlee | Corresponding Member | | 1952 | Resigned in 1956. |
| Willem Johan van der Oord | Corresponding member | | 1969 | |
| Jan Willem Louis van Oordt | | | 1855 | |
| Jan Hendrik Oort | Member | | 1937 | Resigned in 1943, re-admitted in 1945. |
| Arend Joan Petrus Oort | Member | | 1958 | |
| John van der Oost | Member | Natural Sciences and Engineering | 2017 | |
| Luitzen Johannes Oosterhoff | Member | | 1963 | |
| Frits van Oostrom | Member | Humanities | 1994 | |
| Eric Opdam | Member | Natural Sciences and Engineering | 2012 | |
| Jacques Oppenheim | Member | | 1902 | |
| Hans Opschoor | Member | Behavioural Sciences, Social Sciences and Law | 1994 | |
| Cornelis Willem Opzoomer | Member | | 1856 | |
| Gerrit van Orden | | | 1821 | |
| Johann Caspar von Orelli | | | 1832 | |
| Gordon Orians | Foreign Member | Natural Sciences and Engineering | 1983 | |
| L.S. Ornstein | Member | | 1929 | |
| Michel Orrit | Member | Natural Sciences and Engineering | 2018 | |
| Jhr. Jacob Reinoud Theodoor Ortt | | | 1870 | |
| Henk van Os | Member | Humanities | 1989 | |
| Jim van Os | Member | Medical, Biomedical and Health Sciences | 2011 | |
| Pieter Gerardus van Os | | | 1820 | |
| Jan Osse | Member | Natural Sciences and Engineering | 1994 | |
| Frederik Daniel Eduard van Ossenbruggen | | | 1916 | |
| Ab Osterhaus | Member | Medical, Biomedical and Health Sciences | 2001 | |
| Jeremiah Ostriker | Foreign Member | Natural Sciences and Engineering | 1999 | |
| Friedrich Wilhelm Ostwald | Foreign Member | | 1904 | |
| Louis Otten | Corresponding Member | | 1934 | |
| Koen Ottenheym | Member | Humanities | 2010 | |
| Sijbren Otto | Member | Natural Sciences and Engineering | 2020 | |
| Corneille Antoine Jean Abram Oudemans | Member | | 1858 | |
| Antonie Corneille Oudemans, Junior | Member | | 1869 | |
| Jean Abraham Chrétien Oudemans | Member | | 1855 | |
| Alexander van Oudenaarden | Member | Medical, Biomedical and Health Sciences | 2014 | |
| Adrianus Jacob François Oudendal | Corresponding Member | | 1926 | Resigned in 1930. |
| Sir William G. Ouseley of Crickhowell | | | 1815 | |
| Julius Christiaan van Oven | Member | | 1948 | |
| Jan Theodoor Gerard Overbeek | Member | | 1953 | |
| Hermen Overkleeft | Member | Natural Sciences and Engineering | 2018 | |
| Richard Owen | | | 1844 | |
| Hendrik van Oyen | Foreign Member | | 1956 | |