Ernest Günther I, Duke of Schleswig-Holstein-Sonderburg-Augustenburg

Ernest Günther I of Schleswig-Holstein-Sonderburg-Augustenburg was a Duke of Schleswig-Holstein of its Sonderburg line. He was the first to have his ducal seat in Augustenborg Palace, which he built and named in honor of his wife. He ruled from 1647 until his death in 1689.

14 October 1609

Born on the same birth day (14 October): Ariela Barer • Christian Pineau • Elizabeth Esteve-Coll • John See • John Wooden • Julia A. Ames • Marcia Barrett • Mikhail Pervukhin • Stacy Keibler • W. Edwards Deming

Born in the same month (October 1609): Gerrard Winstanley • John Clarke (Baptist minister) • Paul Fleming (poet) • Thomas Weston, 4th Earl of Portland • William Sprague (1609–1675)