What is "koopmans"

Koopmans is a Dutch surname. Notable people with the surname include:

• Aart Koopmans (1946–2007), Dutch businessman
• Ger Koopmans (born 1962), Dutch politician
• Leo Koopmans (born 1953), Dutch ice hockey player
• Thijmen Koopmans (1929–2015), Dutch judge
• Tjalling Koopmans (1910–1985), Dutch economist