Duiker () is a Dutch and Afrikaans surname which in both languages means "diver". Notable people with this name include:
Itumeleng Duiker (born 1972), Botswana former footballer Jan Duiker (1890–1935), Dutch architect K. Sello Duiker (1974–2005), South African novelist Simon Duiker (1874–1941), Dutch painter William J. Duiker (born 1932), former United States Foreign Service officer
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