An elder of Sri Lanka, master of the Tipiṭaka and a well-known commentator. His explanation, given at Lohapāsāda, of the meaning of liberated in both ways (ubhatobhāgavimutta) is regarded as the most authoritative interpretation (DA.ii.514). The Visuddhimagga (p.364; see also Cūḷasumma) also mentions a Cūḷasumana, resident at Niṅkapoṇṇa-padhānaghara on Cittalapabbata. He had discarded desire, and therefore the thought arose in him that he was a saint.