Gabriel Báthory, Prince of Transylvania (d. 1613)
Gabriel Báthory (Hungarian: Báthory Gábor; 15 August 1589 – 27 October 1613) was Prince of Transylvania from 1608 to 1613. Born to the Roman Catholic branch of the Báthory family, he was closely related to four rulers of the Principality of Transylvania (a vassal state of the Ottoman Empire which had developed in the eastern territories of the medieval Kingdom of Hungary). His father, Stephen Báthory, held estates in the principality, but never ruled it. Being a minor when his father died in 1601, Gabriel became the ward of the childless Stephen Báthory, from the Protestant branch of the family, who converted him to Calvinism. After inheriting his guardian's most estates in 1605, Gabriel became one of the wealthiest landowners in Transylvania and Royal Hungary (a realm of the Habsburg Empire which included the northern and western parts of medieval Hungary).
Gabriel made an alliance with the Hajdús—irregular troops stationing along the borders of Transylvania and Royal Hungary—and laid claim to Transylvania against the elderly prince, Sigismund Rákóczi in February 1608. Rákóczi abdicated and the Diet of Transylvania elected Gabriel prince without resistance. Both the Sublime Porte and the Habsburg ruler Matthias II acknowledged Gabriel's election. He ignored the privileges of the Transylvanian Saxons and captured their wealthiest town, Szeben (now Sibiu in Romania), provoking an uprising in 1610. His attempts to expand his authority over the Ottoman vassal Wallachia and his negotiations with Matthias II outraged the Ottoman Sultan Ahmed I. The Sultan decided to replace Gabriel with an exiled Transylvanian nobleman, Gabriel Bethlen, and sent troops to invade the principality in August 1613. Transylvania was unable to resist and the Diet dethroned Gabriel. He was murdered by Hajdú assassins.