Zwemer family.

Adrian Zwemer moved his family to Holland, Michigan, in 1856. He was ordained by the Classis of Holland, Reformed Church in America, in 1858. Samuel Zwemer was born in 1867 to Adrian and Catherine Zwemer. He graduated from Hope College in 1887 and from New Brunswick Theological Seminary in 1890. That same year, Samuel Zwemer travelled to Arabia to become a missionary for the Reformed Church in America. In 1929, Samuel, his wife (Amy Wilkes), and their three surviving children moved back to the United States as Samuel had accepted a position at Princeton Theological Seminary. Raymond Lull Zwemer was born in 1902 to Samuel and Amy Zwemer. He became a professor at Harvard Medical School, a science advisor at the United States Department of State, and the chief of the Science Division at the Library of Congress.