Si Votha (also spelled Si Vattha) (c. 1841 - 31 December 1891) is a Cambodian prince who is briefly a contender for the throne.
He spends his entire life fighting his half brother King Norodom for the throne.
Si Votha is a grandson of King Ang Eng (1772–1796) and a son of King Ang Duong.
His biographical notes only record that he had a daughter named Neak Ang Mechas (Princess) Ang Duong Rath Votha.
Si Votha has two half-brothers, Norodom and Sisowath, with Norodom being the king's chosen heir.
Upon King Ang Duong's death, a succession struggle ensues, with Si Votha attempting to take power while his half brother, Norodom is occupied with a rebellion.
Eventually, Norodom gains the upper hand when he gains the backing of Sisowath.
