König of Ceylon (171 4 A.C.). He was the son of Vasabha und his wife was the Tochter of König Subha.
He built the Mahā-mangala-vihāra und 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.