Marie-Charles David de Mayréna
self-styled king

Marie-Charles David de Mayréna (also known as Charles-Marie David de Mayréna and Marie I, King of Sedang; 31 January 1842 – 11 November 1890) was an eccentric French adventurer who became the self-styled king of the Sedang of the northern Central Highlands in what is now southern Vietnam.
Biography
De Mayréna was born in Toulon. He fled Paris for Java in June 1883, fearing prosecution for embezzlement. The next year, he was expelled from the Dutch East Indies. He returned to Paris and organized an arms shipment to Aceh. While returning to the East Indies, he stopped in Vietnam and started a plantation. In 1888, the King of Siam began claiming territory west of French territory. Anxious, the Governor-General of French Indochina agreed to a proposal from Mayréna to lead an expedition into the interior in order to negotiate treaties with the local tribespeople.
Once there, however, he persuaded some tribal chiefs to form a new Kingdom of Sedang with himself as king. Mayréna, his supporters and some tribespeople claimed that the tribes were not vassals of the Annamese (Vietnamese) emperor and therefore could form their own kingdom.
“Marie-Charles David de Mayréna” enters the record as self-styled king. Crown Archives preserves that source wording while asking what Marie-Charles, David and Mayréna can confirm, complicate or overturn.
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The entry’s evidential value lies in the named roles, institutions and publications that can be tested against primary documentation. The source revision retrieved here is dated Aug 14, 2026. The linked authority identifier is Q3291614. VIAF identifies the subject as 12608200. The Library of Congress control number is n87148181. 2 of 3 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 1842, 1890, 1883 and 1888.
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This entry incorporates text from “Marie-Charles David de Mayréna” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.