| Oliveira from B 810138 | 1982 | | 0 | 1 |
| Oliveira the trapeze artist | 1993 | | 0 | 1 |
| Oliver Mc Person | 2021 | | 0 | 1 |
| Oliver Pig | 2024 | | 0 | 1 |
| Oliver Pipper | 2023 | | 0 | 1 |
| Oliver from I ZPP 50-1 | 2022 | | 0 | 1 |
| Oliver the crocodile | 1997 | | 0 | 1 |
| Olivia the ostrich | 1971 | | 0 | 1 |
| Olivier Fiquet | 2020 | | 0 | 1 |
| Olivier le Daim | 1952 | | 0 | 1 |
| Olof | 2022 | | 0 | 1 |
| Olog | 1998 | | 0 | 1 |
| Olímpio Limpo | 1974 | | 0 | 1 |
| Olívio from B 870072 | 1987 | | 0 | 1 |
| Omar Catoca | 1996 | | 0 | 1 |
| Omar Chalenta | 1979 | | 0 | 1 |
| Omar Manjo from B 73125 | 1973 | | 0 | 1 |
| Omar Medalah | 1970 | | 0 | 1 |
| Omar Melo | 1992 | | 0 | 1 |
| Omar Telão | 2014 | | 0 | 1 |
| Ombrin | 2021 | | 0 | 1 |
| Omyrk | 1970 | | 0 | 1 |
| Oncle Zachary | 1994 | | 0 | 1 |
| Ondina the mermaid | 1981 | | 0 | 1 |
| Ondor | 2012 | | 0 | 1 |
| One of Old King Cole's fiddlers three | 1933 | | 0 | 1 |
| Onesto Abe | 2023 | | 0 | 1 |
| Onofre Cofre | 1981 | | 0 | 1 |
| Onofre and Oto | 1978 | | 0 | 1 |
| Onofre from B 810292 | 1982 | | 0 | 1 |
| Onofre from B 830126 | 1984 | | 0 | 1 |
| Onofre from B 830244 | 1984 | | 0 | 1 |
| Onofre from B 920348b | 1994 | | 0 | 1 |
| Onofre from B 960156 | 1997 | | 0 | 1 |
| Onofre from B 960248 | 1997 | | 0 | 1 |
| Onofre the burro | 1990 | | 0 | 1 |
| Onofre the butler | 1986 | | 0 | 1 |
| Onofrio | 2024 | | 0 | 1 |
| Onze Dedos | 1972 | | 0 | 1 |
| Onório from B 840084 | 1984 | | 0 | 1 |
| Oogbog McDuck | 1960 | | 0 | 1 |
| Ooge | 1972 | | 0 | 1 |
| Oola | 2008 | | 0 | 1 |
| Oom Evert | 1968 | | 0 | 1 |
| Opa Opossum | 2000 | | 0 | 1 |
| Opa Vuurvlieg | 2013 | | 0 | 1 |
| Ophelia | 2010 | | 0 | 1 |
| Orazio Smart | 2022 | | 0 | 1 |
| Orca-megattera | 2009 | | 0 | 1 |
| Orelhinha the elephant | 1962 | | 0 | 1 |
| Oreliano from B 820276 | 1983 | | 0 | 1 |
| Oreliano from B 860163 | 1987 | | 0 | 1 |
| Oreliano from B 870153 | 1988 | | 0 | 1 |
| Orion Fusillis | 2017 | | 0 | 1 |
| Orlando Enrolado | 1996 | | 0 | 1 |
| Orlando Feio from B 71001 | 1971 | | 0 | 1 |
| Orlando Feio from B 800123 | 1981 | | 0 | 1 |
| Orlando from B 890164 | 1990 | | 0 | 1 |
| Oros from WoM | 2018 | | 0 | 1 |
| Orozimbo Lota | 1978 | | 0 | 1 |
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