1. Udakadāyaka 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 Sānu Thera. ThagA.i.115.
2. Udayadāyaka 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 Apadāna-verses are found in the Theragāthā Commentary under the names of two theras: Mahā Gavaccha (i.57) and Gangātīriya (i.249).