Gustav Overbeck

Gustav Overbeck, from 1867 von Overbeck, in 1873 Baron von Overbeck (4 March 1830 – 8 April 1894 in London) was a German businessman, adventurer and diplomat.
Baron de Overbeck was appointed as the Maharaja Sabah, Rajah Gaya and Sandakan in a treaty which was signed by Sultan Abdul Momin of Brunei on 29 December 1877. As in 1877, the Brunei Sultanate then still believed and maintained that the territory of North Borneo was in fact still under the control of the Brunei Sultanate. Baron de Overbeck was also appointed as Dato Bendahara and Raja Sandakan in a second treaty signed by Sultan Jamalalulazam of Sulu appointing Baron de Overbeck on 22 January 1878.

• 1862: Prussian Order of the Crown, 4th Class
• 1864: Order of the Iron Crown 3rd Class
• 1867: Commander's Cross of the Order of Franz Joseph

• Rainer Pape: Gustav Freiherr von Overbeck (1830–1894). Eine biographische Skizze, in: Lippische Mitteilungen aus Geschichte und Landeskultur 28 (1959) 163-217
• Volker Schult: Wunsch und Wirklichkeit: deutsch-philippinische Beziehungen im Kontext globaler Verflechtungen 1860–1945. Berlin: Logos 2008 (Berliner Südostasien-Studien 8) ISBN 978-3-8325-1898-1, S. 51–53