Molenaar is a Dutch surname deriving from the Dutch word for "miller".
Notable people with the surname include:
Beau Molenaar (born 1985), Dutch football goalkeeper Cees Molenaar (1928–1979), founder of the football club AZ Dee Molenaar (1918–2020), American mountaineer, author and artist Frans Molenaar (1940–2015), Dutch fashion designer Hillie Molenaar (born 1945), Dutch documentary film director Ivo Molenaar (1935–2018), Dutch statistician and psychometrician Jan Molenaar (1958–2009), perpetrator of the Napier shootings in New Zealand Keith R. Molenaar, American civil engineer Keje Molenaar (born 1958), Dutch footballer Klaas Molenaar (1921–1996), founder of the football club AZ Marjolijn Molenaar (born 1983), Dutch cricketer Peter Molenaar (born 1946), Dutch psychologist Robert Molenaar (born 1969), Dutch footballer Tim Molenaar (born 1981), New Zealand rugby player Willem Molenaar (1945–2022), Dutch cricket umpire
Notable people with the surname Moolenaar include:
Bram Moolenaar (1961–2023), Dutch computer programmer John Moolenaar (born 1961), American politician from Michigan
See also Mulder Smulders