1. Kálaka.-A setthi of Sáketa. His son was the husband of Cúla-Subhaddá (q.v.) and therefore son-in-law of Anáthapindika. Kálaka was a follower of the Niganthas. When the Buddha visited Sáketa, at the request of Cúla-Subhaddá, Kálaka listened to his sermon and became a sotápanna. He gave his park, the Kálakáráma, to the Buddha, and built a vihára there after removing, by force, the Niganthas, who were in possession.
AA.ii.482f; but see DhA.iii.465f, where the setthi's name is given as Ugga of Uggapura; see also Dvy.402, where the name of the city is Pundavardhana and that of Anáthapindika's daughter Sumágadhá.
2. Kálaka. Senápati of King Yasapáni of Benares, a previous birth of Devadatta. The story is given in the Dhammaddhaja Játaka. J.ii.186ff
3. Kálaka.-See Ayya-Kálaka.
4. Kálaka.-See A.v.164, Sutta No. lxxxvii. Is Kálaka here a proper name or a generic name (Kálaka-bhikkhu) meaning a wicked monk?
I am inclined to take it as the latter. See Kálaka(-bhikkhu) Sutta.