De Roo is a Dutch surname meaning "the red (haired) one" (de rode in modern Dutch). It is often concatenated to DeRoo in French and West Flanders.
People with this surname include:
De Roo Alain De Roo (born 1955), Belgian racing cyclist (born 1955), Dutch politician Benjamin de Roo (1940–2016), Dutch-born Australian gymnast (1793–1880), Belgian nobility, politician, and magistrate Jo de Roo (born 1937), Dutch road racing cyclist Joseph De Roo (1932–2001), Belgian translator of Japanese Peter de Roo (born 1970), Dutch footballer Remi De Roo (1924–2022), Canadian Roman Catholic bishop (born 1970), Belgian actress
DeRoo Antoon Emeric Marcel De Roo (1936–1971), Belgian naturalist after whom Deroo's mouse was named. Dave DeRoo (born 1974), American rock bassist David Deroo (born 1985), French road racing cyclist Sam Deroo (born 1992), Belgian volleyball player
See also De Roo van Alderwerelt, Dutch patrician family De Rooij, surname of the same origin Roe (surname), with English and Scottish variants Roe or Roo (south), and Rae or Ray (north), meaning "a female deer"
References
de:De Roo fr:Deroo