A Thera. He was the teacher of Culla Kokálika and, having become an Anágámí, was born as a Pacceka Brahma in the Brahma-world.
When Kokálika was grievously ill, Tudu visited him and exhorted him to put his trust in Sáriputta and Moggallána. But Kokálika refused to accept his advice and drove him away. S.i.149; A.v.171; J.iv.245; AA.ii.852; SA.i.167f; SNA.ii.476.