- Omilianienko, Wladimir, born on 05.07.1922 in Zaporozh'ye, Ukraine
- Onczykowski, Stanislaw, born on 24.03.1906 in Pluchinsko
- Onik, Piotr, born on 12.10.1907
- Onitschtschenko, Alexandr, born on 03.11.1923
- Onufrienko, Afanasij, born on 27.07.1914 in Kirovograd, Ukraine
- Ooms, Amandies, born on 03.01.1903 in Schriek, Belgien
- van Oostrom, Aart, born on 05.03.1911 in Loosdrecht, Niederlande
- Opasinski, Miecyslaw, born on 01.10.1919 in Krosniewice, Polen
- Opatowski, Boruch, born on 09.03.1911 in Piotrków, Polen
- Opelt, Diura, born on 07.05.1925 in Szabor
- Opitz, Heinrich Max Alfred, born on 10.03.1896 in Wendischluppa/Sachsen
- Opitz, Paul Arno, born on 16.02.1882 in Frankenberg/Sachsen
- Oponowicz, Wladyslaw, born on 01.01.1906
- Oram, Leszek, born on 20.02.1923
- Orechwa, Tadeusz, born on 03.03.1906 in Orechwicza
- Orel, Wasilij, born on 01.01.1891 in Maryevka/Dnepropetrovsk, Ukraine
- Orens, Theofil, born on 18.02.1925 in Zwartberg/Limburg, Belgien
- Orlando, Umberto Cosimo, born on 25.12.1913 in Angri, Italien
- Orlic, Dusan, born on 17.11.1923 in Krk, Jugoslawien
- Orlik, Adolf, born on 23.09.1914 in Zarnowce
- Orlow, Wasilij, born on 04.11.1922 in Russkaya Buylovka, Russland
- Orlowski, Adam, born on 14.07.1905 in Rutki, Polen
- Orlowski, Andrej, born on 18.03.1922 in Solina, Polen
- Orlowski, Ludwik, born on 28.07.1887 in Waclawów, Polen
- Orlowski, Piotr, born on 09.08.1929 in Warszawa, Polen