Henry III of Gorizia

Henry III of Gorizia (c. 1263 – April 1323) was the elder son of Count Albert I and Euphemia of Głogów. In 1295–1299 he joined his father's invasion of Istria against Aquileia, taking several towns before a patriarchal army forced them to withdraw. He succeeded as count in 1304, inheriting the family's fiefs in Friuli, Istria, Carniola and Carinthia.

He first fought the patriarch alongside Rizzardo IV da Camino, then changed sides in 1310 to become the patriarchate's captain general and drive Treviso's troops from Friuli, and was podestà of Trieste in 1311. By Beatrix da Camino he had Meinhard V, and by Beatrix of Lower Bavaria John Henry IV.