Tavakaṇṇika
A householder who realised nibbāna from knowledge of the Tathāgata.
He is mentioned in a list of such householders, but nothing further is known of him (A.iii.451).
The reference given is to the Tapussa Sutta, which is followed by the Ballikādi Suttano, i.e. a concatenation of similar discourses for each of the householders (gahāpati) or lay supporters (upāsaka) who are also endowed with the same six virtues: unshakeable confidence in the Buddha, Dhamma, and Saṅgha, and the morality (ariyasīla), insight (ariyañāṇa), and liberation (ariyavimutti) of the Noble Ones.
Bhallika, Anāthapiṇḍika, Citta, Hatthaka Āḷavaka, Mahānāma, Ugga, Uggata, Sūrambaṭṭha, Jīvaka, Nakulapitā, Tavakaṇṇika, Pūraṇa (v.l. Purāṇa), Isidatta, Sandhāna, Vicaya (v.l. Vijaya), Vijayamāhika, Meṇḍaka, Vāseṭṭha, Ariṭṭha.