Johannes Kepler was a German astronomer, mathematician, astrologer, natural philosopher and writer on music. He is a key figure in the 17th-century Scientific Revolution, best known for his laws of planetary motion, and his books Astronomia nova, Harmonice Mundi, and Epitome Astronomiae Copernicanae. These works also provided one of the foundations for Newton's theory of universal gravitation.
Johannes Linnankoski was a Finnish author and playwright, which mainly influenced writing in the Golden Age of Finnish Art. His most famous work is the romance novel, The Song of the Blood-Red Flower (1905). His primary themes were guilt, punishment, and redemption as moral questions.
Johannes Messenius (1579–1636) was a Swedish historian, dramatist and university professor. He was born in the village of Freberga, in Stenby parish in Östergötland, and died in Oulu, in modern-day Finland.
Johannes Nauclerus was a 16th-century Swabian historian and humanist. He was born Johann Vergenhans to a noble man of the same name. As was the fashion of the time, the family's name had been Latinized, with nauclerus, meaning "skipper," being a close translation of Vergenhans, meaning "ferryman." The family's coat of arms depicted a man on a sailing ship.
