1. Udakadáyaka Thera.-An arahant. In a former birth he saw the Buddha Siddattha having his meal and brought him a pot of water. Sixty-one kappas ago he became a king named Vimala (Ap.i.205). He is probably identical with Sánu Thera. ThagA.i.115.
2. Udayadáyaka Thera.-An arahant. In a previous birth he filled a vessel of water for Padumuttara Buddha. As a result, he could find water in any spot he wished (Ap.ii.437). His Apadána-verses are found in the Theragáthá Commentary under the names of two theras: Mahá Gavaccha (i.57) and Gangátíriya (i.249).