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Gijsbert Haan (or Gysbert Haan) (January 3, 1801 - July 27, 1874) was the leader of the 1857 Secession of Dutch-Americans from the Reformed Church in America. He was the creator of the Christian Reformed Church in the United States and Canada. Haan was born in Hilversum, Noord-Holland, Netherlands and died of liver disease in Grand Rapids, Michigan.