| Unhanagara Hatthadatha Sirimannage | |
|---|---|
| King of Anuradhapura | |
| Reign | 691 | 
| Predecessor | Aggabodhi IV | 
| Successor | Manavanna | 
| Dynasty | House of Moriya | 
| Religion | Buddhism | 
Unhanagara Hatthadatha Sirimannage was a king of Anuradhapura in 691. [1] Despite his title, he was more of a good Buddhist monarch, with real power being held by a Tamil minister named Poththakutta who also commanded a significant number of Tamil mercenaries garrisoned in the city. [2] He was placed in succession to deceased Aggabodhi IV and his reign caused further anarchy and discontent among the Buddhist Sinhalese majority of Anuradhapura and nearby.
He was defeated by Manavanna, a son of Kassapa II, who with assistance from Narasimhavarman II of the Pallavas, resolved the Moriya-Lambakanna conflict and restored the rule of the Lambakanna dynasty in Anuradhapura.