Siyaka (reigned c. 949-972 CE), also known as Harsha, is an Indian king from the Paramara dynasty, who rules in west-central India.
He is the first independent sovereign of the Paramara royal house, and is the earliest Paramara ruler known from his own inscriptions.
He startsout as a feudatory of the Rashtrakutas of Manyakheta, and participates in their campaigns against the Pratiharas.
After the death of the Rashtrakuta emperor Krishna III, he fights against the new king Khottiga, and sacs the Rashtrakuta capital Manyakheta in 972 CE.
This ultimately leasd to the decline of the Rashtrakutas, and the establishment of the Paramaras as an imperial power.
Siyaka is also referred to as Siyaka II to distinguish him from Siyaka I, an earlier (and possibly fictional) Paramara king mentioned in the later Udaipur Prashasti inscription.
His other names include Sri-Harshadeva and Simhabhata.