Kertanagara refers to Sri Maharajadiraja Sri Kertanagara Wikrama Dharmatunggadewa, who was the last and most significant ruler of the Singhasari kingdom in Java, Indonesia. He reigned from 1268 to 1292 under various titles, including Kritanagara, Sivabuddha, and Nararya Murdhaja.
During his reign, Javanese trade and political power expanded significantly across the Indonesian archipelago. His leadership is noted for developing these commercial networks and extending the kingdom's influence to its furthest reaches.