One of Bāvarī’s disciples. His question and the Buddha’s answer are found in the Jatukaṇṇi-
In the time of Padumuttara Buddha, Jatukaṇṇī was a banker in Haṃsavatī, rich enough to lend money even to the king, Arindama. One day he saw the Buddha going along the street and, having invited him and twenty thousand monks, gave them a meal at his house. Ap.ii.357 ﬀ.