Bořivoj I, Duke of Bohemia

Bořivoj I (Czech pronunciation: [ˈbor̝ɪvoj], Latin: Borzivogius, c. 852 – c. 889) was the first historically documented Duke of Bohemia and progenitor of the Přemyslid dynasty. His reign over the Duchy of Bohemia is believed to have started about the year 870, but in this era Bohemia was subordinated to Great Moravia. One of the most important clues to the approximate time of his accession is the contemporary Frankish chronicle Annales Fuldenses, which mentions several West Slavic princes in the year 872, among them one Goriwei, who may be identical with Bořivoj.