With a surname or pseudonym starting with O.
Frans Wilhelm Odelmark (1849–1937)
Gunnar Odin (1926–1972)
Edvin Ollers (1888–1959)
Pierre Olofsson (1921–1996)
Axel Olson (1899–1986)
Bengt Olson (born 1930)
Erik Olson (1901–1986)
Ove Olson (1903–1975)
Arne Olsson (1908–2003)
Axel Olsson (1919–2001)
Karin Olsson (1928–2006)
Sören Olsson (1914–2002)
Wilgot Olsson (1906–1990)
Ulf Onsberg (born 1932)
Johnny Oppenheimer (1923–2005)
Bengt Orup (1916–1996)
Johan Ossian-Andersson (1889–1975)
Elvine Osterman (1908–1997)
