The Duke of Gelre was a noble title in the region of Gelre, located in present-day eastern Netherlands. The title was held by various rulers from the House of Valois and later the House of Egmond. Gelre played a significant role in the political landscape of the Low Countries during the Middle Ages, often involved in conflicts and alliances with neighboring territories. The title of Duke of Gelre was officially established in the 15th century, with notable dukes including Charles of Egmond. The duchy was eventually absorbed into the Habsburg Netherlands, leading to the decline of the title's significance. Today, the historical legacy of the Duke of Gelre remains an important part of regional history.