Nikolaou or Nicolaou () is a surname. It means "[child] of Nikolaos", and is both masculine and feminine.
Charis Nicolaou (born 1974), Cypriot footballer Diamantis Nikolaou (1790–1856), Greek klepht Dimitrios Nikolaou (born 1989), Greek footballer George Nicolaou (born 1945), Cypriot judge Giorgos Nicolaou (born 1982), Cypriot footballer Ionas Nicolaou (born 1963), Cypriot politician Jannis Nikolaou (born 1993), German–Greek footballer K. C. Nicolaou, Cypriot-American chemist Konstantia Nikolaou (born 1984), Cypriot shooter Lakis Nikolaou (born 1949), Greek footballer Marios Nicolaou (footballer, born 1981), Cypriot footballer Marios Nicolaou (footballer, born 1983), Cypriot footballer Nikolas Nicolaou (born 1979), Cypriot footballer Nikos Nikolaou (1909–1986), Greek artist Nikos Nikolaou (rower) (1925–?), Greek rower Nikos Nicolaou (disambiguation), several people Panicos Nicolaou, Cypriot banker Ted Nicolaou, American film director, screenwriter and producer
See also Nikolaidis Nikolopoulos Nikolaos Nikolaos