In the Ambaṭṭha Sutta (D.i.92) it is stated that Okkāka, being fond of his queen and wishing to transfer the kingdom to her son, banished from the kingdom the elder princes by another wife. These princes were named Okkāmukha, Karakanda, Hatthinika, and Sīnipura.
The Mahāvastu (which confuses Iksvāku with his ancestor Sujāta) mentions five sons of Iksvāku: Opura, Ulkāmukha, Karandaka, Hastikasīrsa and Nipura (i.348). See also Rockhill, p.9 ﬀ.
They lived on the slopes of the Himavā and, consorting with their sisters and their descendants, formed the Sakyan race. The legend, thus briefly given, is enlarged on with great detail in the Commentaries. According to Buddhaghosa, there are three dynasties with a king named Okkāka at the head of each, all of them lineal descendants of the primeval king, Mahāsammata, and in the line of succession of Maghādeva.
The Okkāka of the third dynasty had five queens — Bhattā, Cittā, Jantū, Jālinī and Visākhā — each with five hundred female attendants. The eldest queen had four sons — mentioned above — and five daughters — Piyā, Suppiyā, Anandā, Vijitā and Vijitasenā. (The Mtu. calls them Suddhā, Vimalā Vijitā, Jālā and Jālī).
When Bhattā died, after the birth of these nine children, the king married another young and beautiful princess and made her the chief queen. Her son was Jantu, and being pleased with him, the king promised her a boon. She claimed the kingdom for her son, and this was the reason for the exile of the elder children (DA.i.258 f; SnA.i.352 f).
The Mahāvaṃsa (Mhv.ii.12‑16) mentions among Okkāka’s descendants, Nipuna, Candimā, Candamukha, Sivisañjaya, Vessantara, Jāli, Sīhavāhana and Sīhassara. The last named had eighty-
Okkāka had a slave-
According to the Brāhmaṇadhammika Sutta (Sn.p.52 ﬀ; AA.ii.737), it was during the time of Okkāka that the brahmins started their practice of slaughtering animals for sacrifice. Till then there had been only three diseases in the world — desire, hunger and old age; but from this time onwards the enraged devas afflicted humans with various kinds of suffering.
It is said (DA.i.258) that the name Okkāka was given to the king because when he spoke light issued from his mouth like a torch (kathanakāle ukkā viya mukhato pabhā niccharati).
Although the Sanskritised form of the Pāḷi name is Iksavāku, it is unlikely that Okkāka is identical with the famous Iksavāku of the Purāṇas, the immediate son of Manu, son of the Sun. The Pāḷi is evidently more primitive, as is shown by the form Okkāmukha, and the name Iksavāku looks like a deliberate attempt at accommodation to the Purānic account. For discussion see Thomas, op.cit., p.6.
According to the Mahāvastu, Iksavāku was the king of the Kosalas and his capital was Sāketa — i.e. Ayodhyā. See also s.v. Sakya.
The Cūḷavaṃsa mentions among Okkāka’s descendants, Mahātissa, Sagara, and Sāhasamalla (q.v.)
The story is related in the Kusa Jātaka. J.v.278 ﬀ.