Udayaditya (reigned c. 1070–1093) was a Paramara ruler of Malwa region of central India, who succeeded Jayasimha I. He was succeeded by his son, either Lakshmadeva or Naravarman. Udayaditya was a brother of Bhoja, the most renowned king of the Paramara dynasty. At the time of Bhoja's death, the Paramara kingdom suffered simultaneous invasions from its Chaulukya and Kalachuri neighbours. Bhoja's successor Jayasimha, possibly his son, appears to have ascended the Paramara throne with the support of the Kalyani Chalukya prince Vikramaditya VI; he was probably dethroned by Vikramaditya's rival brother Someshvara II. After Jayasimha, Udayaditya ascended the Paramara throne. The Udaipur Prashasti inscription says that at Bhoja's death " Dhara was filled with a dense darkness by his foes and his hereditary warriors become infirm in body. Then arose king Udayaditya, another sun as it were, destroying the dense darkness......and gladdening the sight of his people by his splendour". According to the Nagpur inscription, "when he(Bhoja) had become Indra's companion, when the realm was overrun by floods in which its sovereign was submerged, his relative Udayaditya become king delivering the earth which was troubled by kings and taken possession of by Karna...... joined by Karnatas." During Udayaditya's reign, Vikramaditya VI - who now held the Kalyani Chalukya throne - invaded the Paramara kingdom, and captured the territory to the south of the Godavari River. Udayaditya repulsed an invasion by the Chaulukya king Karna. He formed matrimonial alliances with his Guhila, Kalachuri, Vaghela, and Chaulukya neighbours to strengthen his position. Udayaditya was Bhoja's brother, as attested by the Jainad inscription, which names Udayaditya as Jagadeva's father and Bhoja as Jagadeva's paternal uncle. He had three sons - Lakshmadeva, Naravarman, and Jagadeva; and one daughter - Shyamaladevi. His daughter Shyamaladevi married the Rawal of Mewar , The Guhila prince Vijaysinha, and gave birth to Alhandevi, who married the Kalachuri king Gayakarna.