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Wiki information Unhanagara:
Unhanagara Hatthadatha was King of Anuradhapura in the 7th century, whose reign lasted the year 691. He succeeded Aggabodhi IV as King of Anuradhapura and was succeeded by the first monarch from the House of Lambakanna II, Manavanna.
Manavanna was King of Anuradhapura in the 8th century, whose reign lasted from 691 to 726. He succeeded Unhanagara Hatthadatha as King of Anuradhapura and was succeeded by his son Aggabodhi V.