Wikipedia
Yashovarman (also spelled Yasovarman) was a medieval ruler of Kannauj in India. There are few sources that provide information of his life, although he was indubitably a powerful man.
Yashovarman ( IAST: Yaśovarman; reigned c. 1133-1142 CE) was an Indian king from the Paramara dynasty, who ruled in the Malwa region of central India.
Yashovarman succeeded his father Naravarman. His 1135 CE Ujjain inscription mentions him as Maharaja Yashovarma-deva. This Sanskrit-language inscription records the grant of a village.
According to the Prabandha-Chintamani of the 14th century author Merutunga, Yashovarman invaded the capital of Jayasimha Siddharaja, the Solanki (Chalukya) king of Gujarat. In response, Jayasimha attacked the Paramara capital Dhara and captured Yashovarman. The Dahod inscription states that the Solanki king confined Yashovarman to a prison. This fact is also supported by the writings of Hemachandra and Arisimha. As a result of this defeat, a large part of the Paramara kingdom, including its capital Dhara, came under Solanki rule. The Solanki king appointed Mahadeva as the governor of Avanti- mandala (that is, Malwa). Dhara and Ujjain remained under Solanki control during 1136-1143 CE.
A 1142 CE Jhalrapatan inscription suggests that Yashovarman escaped imprisonment, and ruled a small principality in the lower Kali Sindhu valley. However, some historians doubt that the Yashovarman mentioned in this inscription is same as the Paramara king. According to K. C. Jain, if this Yashovarman is indeed the Paramara king, he might have escaped the Chalukya prison with help from the Chauhans of Ajmer. Later, he might have reached some kind of arrangement with Jayasimha Siddharaja, and may have ruled as a Solanki feudatory until his death.
Yashovarman was succeeded by Jayavarman I, who managed to regain control of Dhara.