Koopman

== English == === Etymology === Anglicised from Dutch Koopman, an occupational surname referring to a merchant (Dutch koopman). Doublet of Chapman and Kaufman. === Proper noun === Koopman (plural Koopmans) A surname from Dutch. ==== Statistics ==== According to the 2010 United States Census, Koopman is the 12766th most common surname in the United States, belonging to 2417 individuals. Koopman is most common among White (95.41%) individuals.