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Son of Jan Koopmans and Alida Christiana Hanekamp van Harinxma Brother of Uilke (Ulco) Koopmans; Daniel Jovius Koopmans; Catharina Elisabeth Koopmans; -nn- Koopmans; Eelkje Gebina Koopmans and 1 other; and Johannes Wilco Koopmans « less