De Rooij or de Rooy is a Dutch surname meaning "the red one".Rooij, de /Rooy, de at the Meertens Institute database of surnames in the Netherlands People with this surname include:
Gerard de Rooy (born 1980), Dutch truck racer, son of Jan Jan de Rooy (1943–2024), Dutch truck racer, father of Gerard Jan de Rooij (1932–2008), Dutch Olympic boxer (born 1981), German film score composer (born 1946), Dutch cabaretier Nelly de Rooij (1883–1964), Dutch zoologist and herpetologist Theo de Rooij (born 1957), Dutch bicycle racer and directeur sportif Willem de Rooij (born 1969), Dutch film and installation artist
See also De Roy, a French variant of the surname
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