King of Ceylon (171 4 A.C.). He was the son of Vasabha and his wife was the daughter of King Subha.
He built the Mahā-mangala-vihāra and his wife built the Mātu-vihāra in honour of a monk who had given her his blessing.
Vankanāsika's son was Gajabāhukagāmanī. Mhv.xxxv.108ff.; Dpv.xxii.12, 27f.