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): A. J. Pero • Alexandre Sarnes Negrão • Alexei Kasatonov • Alexis Rannit • Beth Daniel • Dmitry Pisarev • Greg Evigan • Jerry Glanville • Joey Travolta • Jüri Jaanson • Lê Đức Thọ • Mohammad Khatami • P. J. Brown • Quinn Hughes • Reginald Doherty • Roger Moore • Thelma Coyne Long • Werner Daehn • Yukio Sakurauchi • Éamon de Valera

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)